Can't run MCreator 1.8.1

When I downloaded then ran MCreator 1.8.1, the current newest version, I got an error in the Gradle Log. The program told me it had no solution, and I wasn't sure what to do, so I decided to ask on here. If you have any solutions, I thank you in advance. Here's the log below:

   
Executing gradle command: cleanCache clean setupDecompWorkspace --refresh-dependencies
Build info: MCreator 1.8.1, 64-bit, 8192 MB, Mac OS X - bash, JVM 1.8.0_161, JAVA_HOME: Default (not set)
javax.net.ssl.SSLHandshakeException: sun.security.validator.ValidatorException: PKIX path building failed: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target
   at sun.security.ssl.Alerts.getSSLException(Alerts.java:192)
   at sun.security.ssl.SSLSocketImpl.fatal(SSLSocketImpl.java:1949)
   at sun.security.ssl.Handshaker.fatalSE(Handshaker.java:302)
   at sun.security.ssl.Handshaker.fatalSE(Handshaker.java:296)
   at sun.security.ssl.ClientHandshaker.serverCertificate(ClientHandshaker.java:1509)
   at sun.security.ssl.ClientHandshaker.processMessage(ClientHandshaker.java:216)
   at sun.security.ssl.Handshaker.processLoop(Handshaker.java:979)
   at sun.security.ssl.Handshaker.process_record(Handshaker.java:914)
   at sun.security.ssl.SSLSocketImpl.readRecord(SSLSocketImpl.java:1062)
   at sun.security.ssl.SSLSocketImpl.performInitialHandshake(SSLSocketImpl.java:1375)
   at sun.security.ssl.SSLSocketImpl.startHandshake(SSLSocketImpl.java:1403)
   at sun.security.ssl.SSLSocketImpl.startHandshake(SSLSocketImpl.java:1387)
   at sun.net.www.protocol.https.HttpsClient.afterConnect(HttpsClient.java:559)
   at sun.net.www.protocol.https.AbstractDelegateHttpsURLConnection.connect(AbstractD…
   at sun.net.www.protocol.https.HttpsURLConnectionImpl.connect(HttpsURLConnectionImp…
   at net.minecraftforge.gradle.common.BasePlugin.getWithEtag(BasePlugin.java:723)
   at net.minecraftforge.gradle.common.BasePlugin.getRemoteJsons(BasePlugin.java:226)
   at net.minecraftforge.gradle.common.BasePlugin.apply(BasePlugin.java:182)
   at net.minecraftforge.gradle.common.BasePlugin.apply(BasePlugin.java:91)
   at org.gradle.api.internal.plugins.ImperativeOnlyPluginApplicator.applyImperative(ImperativeOnlyPluginApplicator.java:35)
   at org.gradle.api.internal.plugins.RuleBasedPluginApplicator.applyImperative(RuleBasedPluginApplicator.java:43)
   at org.gradle.api.internal.plugins.DefaultPluginManager.doApply(DefaultPluginManager.java:137)
   at org.gradle.api.internal.plugins.DefaultPluginManager.apply(DefaultPluginManager.java:112)
   at org.gradle.api.internal.plugins.DefaultObjectConfigurationAction.applyType(DefaultObjectConfigurationAction.java:113)
   at org.gradle.api.internal.plugins.DefaultObjectConfigurationAction.access$200(DefaultObjectConfigurationAction.java:36)
   at org.gradle.api.internal.plugins.DefaultObjectConfigurationAction$3.run(DefaultObjectConfigurationAction.java:80)
   at org.gradle.api.internal.plugins.DefaultObjectConfigurationAction.execute(DefaultObjectConfigurationAction.java:136)
   at org.gradle.api.internal.project.AbstractPluginAware.apply(AbstractPluginAware.java:46)
   at org.gradle.api.internal.project.ProjectScript.apply(ProjectScript.java:34)
   at org.gradle.api.Script$apply$0.callCurrent(Unknown Source)
   at org.codehaus.groovy.runtime.callsite.CallSiteArray.defaultCallCurrent(CallSiteArray.java:52)
   at org.codehaus.groovy.runtime.callsite.AbstractCallSite.callCurrent(AbstractCallSite.java:154)
   at org.codehaus.groovy.runtime.callsite.AbstractCallSite.callCurrent(AbstractCallSite.java:166)
   at build_3ubkfd2uu2ehs76n2a30vpco7.run(/Users/jackfried/Desktop/MCreator/forge/build.gradle:10)
   at org.gradle.groovy.scripts.internal.DefaultScriptRunnerFactory$ScriptRunnerImpl.run(DefaultScriptRunnerFactory.java:91)
   at org.gradle.configuration.DefaultScriptPluginFactory$ScriptPluginImpl$2.run(DefaultScriptPluginFactory.java:177)
   at org.gradle.configuration.ProjectScriptTarget.addConfiguration(ProjectScriptTarget.java:77)
   at org.gradle.configuration.DefaultScriptPluginFactory$ScriptPluginImpl.apply(DefaultScriptPluginFactory.java:182)
   at org.gradle.configuration.project.BuildScriptProcessor.execute(BuildScriptProcessor.java:38)
   at org.gradle.configuration.project.BuildScriptProcessor.execute(BuildScriptProcessor.java:25)
   at org.gradle.configuration.project.ConfigureActionsProjectEvaluator.evaluate(ConfigureActionsProjectEvaluator.java:34)
   at org.gradle.configuration.project.LifecycleProjectEvaluator.evaluate(LifecycleProjectEvaluator.java:55)
   at org.gradle.api.internal.project.AbstractProject.evaluate(AbstractProject.java:540)
   at org.gradle.api.internal.project.AbstractProject.evaluate(AbstractProject.java:93)
   at org.gradle.execution.TaskPathProjectEvaluator.configureHierarchy(TaskPathProjectEvaluator.java:42)
   at org.gradle.configuration.DefaultBuildConfigurer.configure(DefaultBuildConfigurer.java:35)
   at org.gradle.initialization.DefaultGradleLauncher$2.run(DefaultGradleLauncher.java:124)
   at org.gradle.internal.Factories$1.create(Factories.java:22)
   at org.gradle.internal.progress.DefaultBuildOperationExecutor.run(DefaultBuildOperationExecutor.java:91)
   at org.gradle.internal.progress.DefaultBuildOperationExecutor.run(DefaultBuildOperationExecutor.java:53)
   at org.gradle.initialization.DefaultGradleLauncher.doBuildStages(DefaultGradleLauncher.java:121)
   at org.gradle.initialization.DefaultGradleLauncher.access$200(DefaultGradleLauncher.java:32)
   at org.gradle.initialization.DefaultGradleLauncher$1.create(DefaultGradleLauncher.java:98)
   at org.gradle.initialization.DefaultGradleLauncher$1.create(DefaultGradleLauncher.java:92)
   at org.gradle.internal.progress.DefaultBuildOperationExecutor.run(DefaultBuildOperationExecutor.java:91)
   at org.gradle.internal.progress.DefaultBuildOperationExecutor.run(DefaultBuildOperationExecutor.java:63)
   at org.gradle.initialization.DefaultGradleLauncher.doBuild(DefaultGradleLauncher.java:92)
   at org.gradle.initialization.DefaultGradleLauncher.run(DefaultGradleLauncher.java:83)
   at org.gradle.launcher.exec.InProcessBuildActionExecuter$DefaultBuildController.run(InProcessBuildActionExecuter.java:99)
   at org.gradle.tooling.internal.provider.ExecuteBuildActionRunner.run(ExecuteBuildActionRunner.java:28)
   at org.gradle.launcher.exec.ChainingBuildActionRunner.run(ChainingBuildActionRunner.java:35)
   at org.gradle.launcher.exec.InProcessBuildActionExecuter.execute(InProcessBuildActionExecuter.java:48)
   at org.gradle.launcher.exec.InProcessBuildActionExecuter.execute(InProcessBuildActionExecuter.java:30)
   at org.gradle.launcher.exec.ContinuousBuildActionExecuter.execute(ContinuousBuildActionExecuter.java:81)
   at org.gradle.launcher.exec.ContinuousBuildActionExecuter.execute(ContinuousBuildActionExecuter.java:46)
   at org.gradle.launcher.daemon.server.exec.ExecuteBuild.doBuild(ExecuteBuild.java:52)
   at org.gradle.launcher.daemon.server.exec.BuildCommandOnly.execute(BuildCommandOnly.java:36)
   at org.gradle.launcher.daemon.server.api.DaemonCommandExecution.proceed(DaemonCommandExecution.java:120)
   at org.gradle.launcher.daemon.server.exec.WatchForDisconnection.execute(WatchForDisconnection.java:37)
   at org.gradle.launcher.daemon.server.api.DaemonCommandExecution.proceed(DaemonCommandExecution.java:120)
   at org.gradle.launcher.daemon.server.exec.ResetDeprecationLogger.execute(ResetDeprecationLogger.java:26)
   at org.gradle.launcher.daemon.server.api.DaemonCommandExecution.proceed(DaemonCommandExecution.java:120)
   at org.gradle.launcher.daemon.server.exec.RequestStopIfSingleUsedDaemon.execute(RequestStopIfSingleUsedDaemon.java:34)
   at org.gradle.launcher.daemon.server.api.DaemonCommandExecution.proceed(DaemonCommandExecution.java:120)
   at org.gradle.launcher.daemon.server.exec.ForwardClientInput$2.call(ForwardClientInput.java:74)
   at org.gradle.launcher.daemon.server.exec.ForwardClientInput$2.call(ForwardClientInput.java:72)
   at org.gradle.util.Swapper.swap(Swapper.java:38)
   at org.gradle.launcher.daemon.server.exec.ForwardClientInput.execute(ForwardClientInput.java:72)
   at org.gradle.launcher.daemon.server.api.DaemonCommandExecution.proceed(DaemonCommandExecution.java:120)
   at org.gradle.launcher.daemon.server.health.DaemonHealthTracker.execute(DaemonHealthTracker.java:40)
   at org.gradle.launcher.daemon.server.api.DaemonCommandExecution.proceed(DaemonCommandExecution.java:120)
   at org.gradle.launcher.daemon.server.exec.LogToClient.doBuild(LogToClient.java:60)
   at org.gradle.launcher.daemon.server.exec.BuildCommandOnly.execute(BuildCommandOnly.java:36)
   at org.gradle.launcher.daemon.server.api.DaemonCommandExecution.proceed(DaemonCommandExecution.java:120)
   at org.gradle.launcher.daemon.server.exec.EstablishBuildEnvironment.doBuild(EstablishBuildEnvironment.java:72)
   at org.gradle.launcher.daemon.server.exec.BuildCommandOnly.execute(BuildCommandOnly.java:36)
   at org.gradle.launcher.daemon.server.api.DaemonCommandExecution.proceed(DaemonCommandExecution.java:120)
   at org.gradle.launcher.daemon.server.health.HintGCAfterBuild.execute(HintGCAfterBuild.java:41)
   at org.gradle.launcher.daemon.server.api.DaemonCommandExecution.proceed(DaemonCommandExecution.java:120)
   at org.gradle.launcher.daemon.server.exec.StartBuildOrRespondWithBusy$1.run(StartBuildOrRespondWithBusy.java:50)
   at org.gradle.launcher.daemon.server.DaemonStateCoordinator$1.run(DaemonStateCoordinator.java:237)
   at org.gradle.internal.concurrent.ExecutorPolicy$CatchAndRecordFailures.onExecute(ExecutorPolicy.java:54)
   at org.gradle.internal.concurrent.StoppableExecutorImpl$1.run(StoppableExecutorImpl.java:40)
   at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
   at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
   at java.lang.Thread.run(Thread.java:745)
Caused by: sun.security.validator.ValidatorException: PKIX path building failed: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target
   at sun.security.validator.PKIXValidator.doBuild(PKIXValidator.java:387)
   at sun.security.validator.PKIXValidator.engineValidate(PKIXValidator.java:292)
   at sun.security.validator.Validator.validate(Validator.java:260)
   at sun.security.ssl.X509TrustManagerImpl.validate(X509TrustManagerImpl.java:324)
   at sun.security.ssl.X509TrustManagerImpl.checkTrusted(X509TrustManagerImpl.java:229)
   at sun.security.ssl.X509TrustManagerImpl.checkServerTrusted(X509TrustManagerImpl.java:124)
   at sun.security.ssl.ClientHandshaker.serverCertificate(ClientHandshaker.java:1491)
   ... 91 more
Caused by: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target
   at sun.security.provider.certpath.SunCertPathBuilder.build(SunCertPathBuilder.java:141)
   at sun.security.provider.certpath.SunCertPathBuilder.engineBuild(SunCertPathBuilder.java:126)
   at java.security.cert.CertPathBuilder.build(CertPathBuilder.java:280)
   at sun.security.validator.PKIXValidator.doBuild(PKIXValidator.java:382)
   ... 97 more
javax.net.ssl.SSLHandshakeException: sun.security.validator.ValidatorException: PKIX path building failed: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target
   at sun.security.ssl.Alerts.getSSLException(Alerts.java:192)
   at sun.security.ssl.SSLSocketImpl.fatal(SSLSocketImpl.java:1949)
   at sun.security.ssl.Handshaker.fatalSE(Handshaker.java:302)
   at sun.security.ssl.Handshaker.fatalSE(Handshaker.java:296)
   at sun.security.ssl.ClientHandshaker.serverCertificate(ClientHandshaker.java:1509)
   at sun.security.ssl.ClientHandshaker.processMessage(ClientHandshaker.java:216)
   at sun.security.ssl.Handshaker.processLoop(Handshaker.java:979)
   at sun.security.ssl.Handshaker.process_record(Handshaker.java:914)
   at sun.security.ssl.SSLSocketImpl.readRecord(SSLSocketImpl.java:1062)
   at sun.security.ssl.SSLSocketImpl.performInitialHandshake(SSLSocketImpl.java:1375)
   at sun.security.ssl.SSLSocketImpl.startHandshake(SSLSocketImpl.java:1403)
   at sun.security.ssl.SSLSocketImpl.startHandshake(SSLSocketImpl.java:1387)
   at sun.net.www.protocol.https.HttpsClient.afterConnect(HttpsClient.java:559)
   at sun.net.www.protocol.https.AbstractDelegateHttpsURLConnection.connect(AbstractD…
   at sun.net.www.protocol.https.HttpsURLConnectionImpl.connect(HttpsURLConnectionImp…
   at net.minecraftforge.gradle.common.BasePlugin.getWithEtag(BasePlugin.java:723)
   at net.minecraftforge.gradle.common.BasePlugin.getWithEtag(BasePlugin.java:684)
   at net.minecraftforge.gradle.user.patcherUser.forge.ForgePlugin.setForgeVersionJson(ForgePlugin.java:159)
   at net.minecraftforge.gradle.user.patcherUser.forge.ForgePlugin.applyUserPlugin(ForgePlugin.java:56)
   at net.minecraftforge.gradle.user.UserBasePlugin.applyPlugin(UserBasePlugin.java:171)
   at net.minecraftforge.gradle.common.BasePlugin.apply(BasePlugin.java:214)
   at net.minecraftforge.gradle.common.BasePlugin.apply(BasePlugin.java:91)
   at org.gradle.api.internal.plugins.ImperativeOnlyPluginApplicator.applyImperative(ImperativeOnlyPluginApplicator.java:35)
   at org.gradle.api.internal.plugins.RuleBasedPluginApplicator.applyImperative(RuleBasedPluginApplicator.java:43)
   at org.gradle.api.internal.plugins.DefaultPluginManager.doApply(DefaultPluginManager.java:137)
   at org.gradle.api.internal.plugins.DefaultPluginManager.apply(DefaultPluginManager.java:112)
   at org.gradle.api.internal.plugins.DefaultObjectConfigurationAction.applyType(DefaultObjectConfigurationAction.java:113)
   at org.gradle.api.internal.plugins.DefaultObjectConfigurationAction.access$200(DefaultObjectConfigurationAction.java:36)
   at org.gradle.api.internal.plugins.DefaultObjectConfigurationAction$3.run(DefaultObjectConfigurationAction.java:80)
   at org.gradle.api.internal.plugins.DefaultObjectConfigurationAction.execute(DefaultObjectConfigurationAction.java:136)
   at org.gradle.api.internal.project.AbstractPluginAware.apply(AbstractPluginAware.java:46)
   at org.gradle.api.internal.project.ProjectScript.apply(ProjectScript.java:34)
   at org.gradle.api.Script$apply$0.callCurrent(Unknown Source)
   at org.codehaus.groovy.runtime.callsite.CallSiteArray.defaultCallCurrent(CallSiteArray.java:52)
   at org.codehaus.groovy.runtime.callsite.AbstractCallSite.callCurrent(AbstractCallSite.java:154)
   at org.codehaus.groovy.runtime.callsite.AbstractCallSite.callCurrent(AbstractCallSite.java:166)
   at build_3ubkfd2uu2ehs76n2a30vpco7.run(/Users/jackfried/Desktop/MCreator/forge/build.gradle:10)
   at org.gradle.groovy.scripts.internal.DefaultScriptRunnerFactory$ScriptRunnerImpl.run(DefaultScriptRunnerFactory.java:91)
   at org.gradle.configuration.DefaultScriptPluginFactory$ScriptPluginImpl$2.run(DefaultScriptPluginFactory.java:177)
   at org.gradle.configuration.ProjectScriptTarget.addConfiguration(ProjectScriptTarget.java:77)
   at org.gradle.configuration.DefaultScriptPluginFactory$ScriptPluginImpl.apply(DefaultScriptPluginFactory.java:182)
   at org.gradle.configuration.project.BuildScriptProcessor.execute(BuildScriptProcessor.java:38)
   at org.gradle.configuration.project.BuildScriptProcessor.execute(BuildScriptProcessor.java:25)
   at org.gradle.configuration.project.ConfigureActionsProjectEvaluator.evaluate(ConfigureActionsProjectEvaluator.java:34)
   at org.gradle.configuration.project.LifecycleProjectEvaluator.evaluate(LifecycleProjectEvaluator.java:55)
   at org.gradle.api.internal.project.AbstractProject.evaluate(AbstractProject.java:540)
   at org.gradle.api.internal.project.AbstractProject.evaluate(AbstractProject.java:93)
   at org.gradle.execution.TaskPathProjectEvaluator.configureHierarchy(TaskPathProjectEvaluator.java:42)
   at org.gradle.configuration.DefaultBuildConfigurer.configure(DefaultBuildConfigurer.java:35)
   at org.gradle.initialization.DefaultGradleLauncher$2.run(DefaultGradleLauncher.java:124)
   at org.gradle.internal.Factories$1.create(Factories.java:22)
   at org.gradle.internal.progress.DefaultBuildOperationExecutor.run(DefaultBuildOperationExecutor.java:91)
   at org.gradle.internal.progress.DefaultBuildOperationExecutor.run(DefaultBuildOperationExecutor.java:53)
   at org.gradle.initialization.DefaultGradleLauncher.doBuildStages(DefaultGradleLauncher.java:121)
   at org.gradle.initialization.DefaultGradleLauncher.access$200(DefaultGradleLauncher.java:32)
   at org.gradle.initialization.DefaultGradleLauncher$1.create(DefaultGradleLauncher.java:98)
   at org.gradle.initialization.DefaultGradleLauncher$1.create(DefaultGradleLauncher.java:92)
   at org.gradle.internal.progress.DefaultBuildOperationExecutor.run(DefaultBuildOperationExecutor.java:91)
   at org.gradle.internal.progress.DefaultBuildOperationExecutor.run(DefaultBuildOperationExecutor.java:63)
   at org.gradle.initialization.DefaultGradleLauncher.doBuild(DefaultGradleLauncher.java:92)
   at org.gradle.initialization.DefaultGradleLauncher.run(DefaultGradleLauncher.java:83)
   at org.gradle.launcher.exec.InProcessBuildActionExecuter$DefaultBuildController.run(InProcessBuildActionExecuter.java:99)
   at org.gradle.tooling.internal.provider.ExecuteBuildActionRunner.run(ExecuteBuildActionRunner.java:28)
   at org.gradle.launcher.exec.ChainingBuildActionRunner.run(ChainingBuildActionRunner.java:35)
   at org.gradle.launcher.exec.InProcessBuildActionExecuter.execute(InProcessBuildActionExecuter.java:48)
   at org.gradle.launcher.exec.InProcessBuildActionExecuter.execute(InProcessBuildActionExecuter.java:30)
   at org.gradle.launcher.exec.ContinuousBuildActionExecuter.execute(ContinuousBuildActionExecuter.java:81)
   at org.gradle.launcher.exec.ContinuousBuildActionExecuter.execute(ContinuousBuildActionExecuter.java:46)
   at org.gradle.launcher.daemon.server.exec.ExecuteBuild.doBuild(ExecuteBuild.java:52)
   at org.gradle.launcher.daemon.server.exec.BuildCommandOnly.execute(BuildCommandOnly.java:36)
   at org.gradle.launcher.daemon.server.api.DaemonCommandExecution.proceed(DaemonCommandExecution.java:120)
   at org.gradle.launcher.daemon.server.exec.WatchForDisconnection.execute(WatchForDisconnection.java:37)
   at org.gradle.launcher.daemon.server.api.DaemonCommandExecution.proceed(DaemonCommandExecution.java:120)
   at org.gradle.launcher.daemon.server.exec.ResetDeprecationLogger.execute(ResetDeprecationLogger.java:26)
   at org.gradle.launcher.daemon.server.api.DaemonCommandExecution.proceed(DaemonCommandExecution.java:120)
   at org.gradle.launcher.daemon.server.exec.RequestStopIfSingleUsedDaemon.execute(RequestStopIfSingleUsedDaemon.java:34)
   at org.gradle.launcher.daemon.server.api.DaemonCommandExecution.proceed(DaemonCommandExecution.java:120)
   at org.gradle.launcher.daemon.server.exec.ForwardClientInput$2.call(ForwardClientInput.java:74)
   at org.gradle.launcher.daemon.server.exec.ForwardClientInput$2.call(ForwardClientInput.java:72)
   at org.gradle.util.Swapper.swap(Swapper.java:38)
   at org.gradle.launcher.daemon.server.exec.ForwardClientInput.execute(ForwardClientInput.java:72)
   at org.gradle.launcher.daemon.server.api.DaemonCommandExecution.proceed(DaemonCommandExecution.java:120)
   at org.gradle.launcher.daemon.server.health.DaemonHealthTracker.execute(DaemonHealthTracker.java:40)
   at org.gradle.launcher.daemon.server.api.DaemonCommandExecution.proceed(DaemonCommandExecution.java:120)
   at org.gradle.launcher.daemon.server.exec.LogToClient.doBuild(LogToClient.java:60)
   at org.gradle.launcher.daemon.server.exec.BuildCommandOnly.execute(BuildCommandOnly.java:36)
   at org.gradle.launcher.daemon.server.api.DaemonCommandExecution.proceed(DaemonCommandExecution.java:120)
   at org.gradle.launcher.daemon.server.exec.EstablishBuildEnvironment.doBuild(EstablishBuildEnvironment.java:72)
   at org.gradle.launcher.daemon.server.exec.BuildCommandOnly.execute(BuildCommandOnly.java:36)
   at org.gradle.launcher.daemon.server.api.DaemonCommandExecution.proceed(DaemonCommandExecution.java:120)
   at org.gradle.launcher.daemon.server.health.HintGCAfterBuild.execute(HintGCAfterBuild.java:41)
   at org.gradle.launcher.daemon.server.api.DaemonCommandExecution.proceed(DaemonCommandExecution.java:120)
   at org.gradle.launcher.daemon.server.exec.StartBuildOrRespondWithBusy$1.run(StartBuildOrRespondWithBusy.java:50)
   at org.gradle.launcher.daemon.server.DaemonStateCoordinator$1.run(DaemonStateCoordinator.java:237)
   at org.gradle.internal.concurrent.ExecutorPolicy$CatchAndRecordFailures.onExecute(ExecutorPolicy.java:54)
   at org.gradle.internal.concurrent.StoppableExecutorImpl$1.run(StoppableExecutorImpl.java:40)
   at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
   at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
   at java.lang.Thread.run(Thread.java:745)
Caused by: sun.security.validator.ValidatorException: PKIX path building failed: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target
   at sun.security.validator.PKIXValidator.doBuild(PKIXValidator.java:387)
   at sun.security.validator.PKIXValidator.engineValidate(PKIXValidator.java:292)
   at sun.security.validator.Validator.validate(Validator.java:260)
   at sun.security.ssl.X509TrustManagerImpl.validate(X509TrustManagerImpl.java:324)
   at sun.security.ssl.X509TrustManagerImpl.checkTrusted(X509TrustManagerImpl.java:229)
   at sun.security.ssl.X509TrustManagerImpl.checkServerTrusted(X509TrustManagerImpl.java:124)
   at sun.security.ssl.ClientHandshaker.serverCertificate(ClientHandshaker.java:1491)
   ... 94 more
Caused by: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target
   at sun.security.provider.certpath.SunCertPathBuilder.build(SunCertPathBuilder.java:141)
   at sun.security.provider.certpath.SunCertPathBuilder.engineBuild(SunCertPathBuilder.java:126)
   at java.security.cert.CertPathBuilder.build(CertPathBuilder.java:280)
   at sun.security.validator.PKIXValidator.doBuild(PKIXValidator.java:382)
   ... 100 more
FAILURE: Build failed with an exception.
* Where:
Build file '/Users/jackfried/Desktop/MCreator/forge/build.gradle' line: 10
* What went wrong:
A problem occurred evaluating root project 'forge'.
> Failed to apply plugin [id 'net.minecraftforge.gradle.forge']
> Unable to obtain url ([https://files.minecraftforge.net/maven/net/minecraftforge/forge/json]) with etag!
* Try:
Run with --stacktrace option to get the stack trace. Run with --info or --debug option to get more log output.
BUILD FAILED
Total time: 23.813 secs
Task completed with return code 1 in 25012 milliseconds