Animated geckolib entity not compiling

My custom geckolib entity is not compiling, i have made sure the model and animation names are the same and have no capital letters. I have enabled the geckolib dependency in my workspace and also enabled java plugins. Whenever i try to test the mod, the geckolib mob will not compile. How do i fix this?

Here is the log/whatever its called:

Executing Gradle task: runClient
Build info: MCreator 2023.3.35319, forge-1.20.1, 64-bit, 8192 MB, Mac OS X, JVM 17.0.7, JAVA_HOME: /Users/lilstaffo28/Documents/mcreator2.app/Contents/jdk.bundle/Contents/Home, started on: 2023-09-27-21:44:59

> Task :compileJava FAILED
/Users/lilstaffo28/MCreatorWorkspaces/catcatcat/src/main/java/net/mcreator/catcatcat/entity/PoisonVoidlingEntity.java:244: error: cannot find symbol  if (!this.isOnGround()) {
  ^
symbol: method isOnGround()
/Users/lilstaffo28/MCreatorWorkspaces/catcatcat/src/main/java/net/mcreator/catcatcat/entity/PoisonVoidlingEntity.java:258: error: level has private access in Entity  this.lastSwing = level.getGameTime();
   ^
/Users/lilstaffo28/MCreatorWorkspaces/catcatcat/src/main/java/net/mcreator/catcatcat/entity/PoisonVoidlingEntity.java:260: error: level has private access in Entity  if (this.swinging && this.lastSwing + 7L <= level.getGameTime()) {
      ^
3 errors
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 4s
1 actionable task: 1 executed

BUILD FAILED
Task completed in 7 seconds