This is the log:
Executing gradle command: wrapper --gradle-version 4.4
Build info: MCreator 1.8.2, 64-bit, 8107 MB, Windows 10 - cmd, JVM 1.8.0_192, JAVA_HOME: C:\Pylo\MCreator182\.\jdk
(c) 2018 Microsoft Corporation. Tutti i diritti sono riservati.
C:\Pylo\MCreator182\forge>gradlew -Dorg.gradle.daemon=false -Dorg.gradle.parallel=false -Dorg.gradle.jvmargs="-Xms625m -Xmx2048m" wrapper --gradle-version 4.4
Exception in thread "main" java.lang.RuntimeException: Could not locate the Gradle launcher JAR in Gradle distribution 'C:\Users\Phart\.mcreator\gradle\wrapper\dists\gradle-2.14-bin\76oc0mnc3ieqtsukq90mp0rxk\gradle-2.14'.
at org.gradle.wrapper.BootstrapMainStarter.findLauncherJar(BootstrapMainStarter.java:39)
at org.gradle.wrapper.BootstrapMainStarter.start(BootstrapMainStarter.java:25)
at org.gradle.wrapper.WrapperExecutor.execute(WrapperExecutor.java:127)
at org.gradle.wrapper.GradleWrapperMain.main(GradleWrapperMain.java:61)
C:\Pylo\MCreator182\forge>
Task completed with return code 0 in 447 milliseconds
Executing gradle command: setupDecompWorkspace --refresh-dependencies
Build info: MCreator 1.8.2, 64-bit, 8107 MB, Windows 10 - cmd, JVM 1.8.0_192, JAVA_HOME: C:\Pylo\MCreator182\.\jdk
(c) 2018 Microsoft Corporation. Tutti i diritti sono riservati.
C:\Pylo\MCreator182\forge>gradlew -Dorg.gradle.daemon=false -Dorg.gradle.parallel=false -Dorg.gradle.jvmargs="-Xms625m -Xmx2048m" setupDecompWorkspace --refresh-dependencies
Exception in thread "main" java.lang.RuntimeException: Could not locate the Gradle launcher JAR in Gradle distribution 'C:\Users\Phart\.mcreator\gradle\wrapper\dists\gradle-2.14-bin\76oc0mnc3ieqtsukq90mp0rxk\gradle-2.14'.
at org.gradle.wrapper.BootstrapMainStarter.findLauncherJar(BootstrapMainStarter.java:39)
at org.gradle.wrapper.BootstrapMainStarter.start(BootstrapMainStarter.java:25)
at org.gradle.wrapper.WrapperExecutor.execute(WrapperExecutor.java:127)
at org.gradle.wrapper.GradleWrapperMain.main(GradleWrapperMain.java:61)
C:\Pylo\MCreator182\forge>
Task completed with return code 0 in 726 milliseconds
Executing gradle command: wrapper --gradle-version 4.4
Build info: MCreator 1.8.2, 64-bit, 8107 MB, Windows 10 - cmd, JVM 1.8.0_192, JAVA_HOME: C:\Pylo\MCreator182\.\jdk
(c) 2018 Microsoft Corporation. Tutti i diritti sono riservati.
C:\Pylo\MCreator182\forge>gradlew -Dorg.gradle.daemon=false -Dorg.gradle.parallel=false -Dorg.gradle.jvmargs="-Xms1000m -Xmx3000m" wrapper --gradle-version 4.4
Exception in thread "main" java.lang.RuntimeException: Could not locate the Gradle launcher JAR in Gradle distribution 'C:\Users\Phart\.mcreator\gradle\wrapper\dists\gradle-2.14-bin\76oc0mnc3ieqtsukq90mp0rxk\gradle-2.14'.
at org.gradle.wrapper.BootstrapMainStarter.findLauncherJar(BootstrapMainStarter.java:39)
at org.gradle.wrapper.BootstrapMainStarter.start(BootstrapMainStarter.java:25)
at org.gradle.wrapper.WrapperExecutor.execute(WrapperExecutor.java:127)
at org.gradle.wrapper.GradleWrapperMain.main(GradleWrapperMain.java:61)
C:\Pylo\MCreator182\forge>
Task completed with return code 0 in 440 milliseconds
Executing gradle command: setupDecompWorkspace --refresh-dependencies
Build info: MCreator 1.8.2, 64-bit, 8107 MB, Windows 10 - cmd, JVM 1.8.0_192, JAVA_HOME: C:\Pylo\MCreator182\.\jdk
(c) 2018 Microsoft Corporation. Tutti i diritti sono riservati.
C:\Pylo\MCreator182\forge>gradlew -Dorg.gradle.daemon=false -Dorg.gradle.parallel=false -Dorg.gradle.jvmargs="-Xms1000m -Xmx3000m" setupDecompWorkspace --refresh-dependencies
Exception in thread "main" java.lang.RuntimeException: Could not locate the Gradle launcher JAR in Gradle distribution 'C:\Users\Phart\.mcreator\gradle\wrapper\dists\gradle-2.14-bin\76oc0mnc3ieqtsukq90mp0rxk\gradle-2.14'.
at org.gradle.wrapper.BootstrapMainStarter.findLauncherJar(BootstrapMainStarter.java:39)
at org.gradle.wrapper.BootstrapMainStarter.start(BootstrapMainStarter.java:25)
at org.gradle.wrapper.WrapperExecutor.execute(WrapperExecutor.java:127)
at org.gradle.wrapper.GradleWrapperMain.main(GradleWrapperMain.java:61)
C:\Pylo\MCreator182\forge>
Task completed with return code 0 in 253 milliseconds
The fix for this is the following:
If this does not help, try the following:
If this does not help, you might need to try the second guide a few times (I had to do it 2 times to make it work).
This issue was caused by an outdated repository that was in use by Minecraft Forge and their development gradle toolkit needs to be updated.
More info in this forum topic: https://mcreator.net/forum/47021/mcreator-cant-install