Setup issues.

Works as designed
Issue description

This is my first time using this. I tried to open it. When setting it up, on the third part, it said this:    
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_202, JAVA_HOME: Default (not set)
FAILURE: Build failed with an exception.
* What went wrong:
Could not determine java version from '11.0.2'.
* 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 2365 milliseconds

Issue comments

You are using Java 11, where MCreator only supports Java 8. Check this page for more info:

You need to have Java 8 as default Java on your computer (JAVA_HOME) and the moment.

Verify this by running java -version to make sure Java 8 is used.

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