MCreator wont start

Issue description

When I start MCreator it says "Gradle task failed." There is the report in the attachments

Issue comments

I can't find the report. Could you try to attach it again? Thanks!

   
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_191, JAVA_HOME: Default (not set)
Unzipping /Users/daniel/.mcreator/gradle/wrapper/dists/gradle-2.14-bin/76oc0mnc3ieqtsukq90mp0rxk/gradle-2.14-bin.zip to /Users/daniel/.mcreator/gradle/wrapper/dists/gradle-2.14-bin/76oc0mnc3ieqtsukq90mp0rxk
Set executable permissions for: /Users/daniel/.mcreator/gradle/wrapper/dists/gradle-2.14-bin/76oc0mnc3ieqtsukq90mp0rxk/gradle-2.14/bin/gradle
Download http://files.minecraftforge.net/maven/net/minecraftforge/gradle/ForgeGradle/2.3-SNAPSHOT/ForgeGradle-2.3-20181113.235420-31.pom
Download https://jcenter.bintray.com/com/google/guava/guava/18.0/guava-18.0.pom
...
Download https://jcenter.bintray.com/org/apache/httpcomponents/httpcore/4.3.2/httpcore-4.3.2.jar
Download https://jcenter.bintray.com/commons-logging/commons-logging/1.1.3/commons-logging-1.1.3.jar
Download https://jcenter.bintray.com/commons-codec/commons-codec/1.6/commons-codec-1.6.jar
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(AbstractDelegateHttpsURLConnection.java:185)
   at sun.net.www.protocol.https.HttpsURLConnectionImpl.connect(HttpsURLConnectionImpl.java:153)
   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)
 ...
...
...
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:146)
   at sun.security.provider.certpath.SunCertPathBuilder.engineBuild(SunCertPathBuilder.java:131)
   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/daniel/Downloads/MCreator 1.8.1 [1.12.2] Mac-Linux 32-64bit/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: 4 mins 6.549 secs
Task completed with return code 1 in 249815 milliseconds
   
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_191, 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)
  ......
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:146)
   at sun.security.provider.certpath.SunCertPathBuilder.engineBuild(SunCertPathBuilder.java:131)
   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 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:146)
   at sun.security.provider.certpath.SunCertPathBuilder.engineBuild(SunCertPathBuilder.java:131)
   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.
BUILD FAILED
* Where:
Build file '/Users/daniel/Downloads/MCreator 1.8.1 [1.12.2] Mac-Linux 32-64bit/forge/build.gradle' line: 10
Total time: 28.142 secs
* 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.
Task completed with return code 1 in 29544 milliseconds

Same issue

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)
Download http://files.minecraftforge.net/maven/net/minecraftforge/gradle/ForgeGr…
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 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:146)
   at sun.security.provider.certpath.SunCertPathBuilder.engineBuild(SunCertPathBuilder.java:131)
   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 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:146)
   at sun.security.provider.certpath.SunCertPathBuilder.engineBuild(SunCertPathBuilder.java:131)
   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 '/Applications/MCreator 1.8.1 [1.12.2] Mac-Linux 32-64bit/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: 32.083 secs
Task completed with return code 1 in 33273 milliseconds

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 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:146)
   at sun.security.provider.certpath.SunCertPathBuilder.engineBuild(SunCertPathBuilder.java:131)
   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 '/Applications/MCreator 1.8.1 [1.12.2] Mac-Linux 32-64bit/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: 24.583 secs
Task completed with return code 1 in 25547 milliseconds

This is a Java related issue common for Mac computers. Related ticket: https://mcreator.net/tracker/issue/42419

TLDR: You should uninstall all Java's you have on your Mac and install Java JDK 8 from a freshly downloaded copy.

It could also be your AV messing with SSL communication.

A really useful writeup on this topic: https://confluence.atlassian.com/kb/unable-to-connect-to-ssl-services-d…