model error

i am new to mcreator and im trying to make a dragon in minecraft but if i recompile my workspace i get this error:

C:\Pylo\MCreator173\forge\build\sources\java\mod\mcreator\mcreator_nightfury.java:122: error: incompatible types: Entitynightfury cannot be converted to EntityCreature
            this.tasks.addTask(6, new EntityAIWander(this, 1.0D));
                                                     ^
Note: Some messages have been simplified; recompile with -Xdiags:verbose to get full output
1 error

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.
 

does someone know how to fix this?