I can't recompile my mod

C:\Pylo\MCreator179\forge\build\sources\main\java\mod\mcreator\TestEnvironmentMod.java:50: error: cannot find symbol
    mcreator_purecoal mcreator_15 = new mcreator_purecoal();
    ^
  symbol:   class mcreator_purecoal
  location: class TestEnvironmentMod
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.
 

*pls help me i can't understand why that fail.