Executing gradle command: runClient
Build info: MCreator 1.9.1, 64-bit, 8150 MB, Windows 10 - cmd, JVM 1.8.0_222, JAVA_HOME: C:\Program Files\Pylo\MCreator\jdk
C:\Users\TheGamingZexo\MCreatorWorkspaces\vanilla_plus>gradlew -Dorg.gradle.java.home="C:/Program Files/Pylo/MCreator/jdk" -Dorg.gradle.parallel=false -Dorg.gradle.jvmargs="-Xms512m -Xmx1500m" runClient
This mapping 'snapshot_20171003' was designed for MC 1.12! Use at your own peril.
:deobfCompileDummyTask
:deobfProvidedDummyTask
:sourceApiJava UP-TO-DATE
:compileApiJava NO-SOURCE
:processApiResources NO-SOURCE
:apiClasses UP-TO-DATE
:sourceMainJava UP-TO-DATE
C:\Users\TheGamingZexo\MCreatorWorkspaces\vanilla_plus\build\sources\main\java\net\mcreator\vanilla_plus\Elementsvanilla_plus.java:173: error: cannot find symbol

      @Retention(RetentionPolicy.RUNTIME)
       ^
  symbol:   class Retention
  location: class ModElement
1 error
:compileJava FAILED
FAILURE: Build failed with an exception.
* What went wrong:
Execution failed for task ':compileJava'.
> Compilation failed; see the compiler error output for details.
* Try:
Run with --stacktrace option to get the stack trace. Run with --info or --debug option to get more log output. Run with --scan to get full insights.
* Get more help at https://help.gradle.org
BUILD FAILED in 2s
5 actionable tasks: 3 executed, 2 up-to-date
C:\Users\TheGamingZexo\MCreatorWorkspaces\vanilla_plus>
Task completed with return code 0 in 3231 milliseconds