When i make a structure i get this error.

I was Trying to make a mod that adds a few buildings to the game, got this error:

C:\Pylo\MCreator178\forge\build\sources\main\java\mod\mcreator\modname.java:39: error: cannot find symbol
    mcreator_abandoned1 mcreator_0 = new mcreator_abandoned1();
    ^
  symbol:   class mcreator_abandoned1
  location: classmodname
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.