mcreator gives the error level has private access when it is public

I don't know if this is the right place for this,For some reason when you add a level in the code mcreator says that it is private when it is public, I have noticed this when editing the code of some mobs that I have created, but from what I have seen when looking for a solution others have had the same problem with other elements that include some level somewhere in the code, I know that the error is not on my part, I checked the imports and the lines of code that I copied from vanilla mobs and I checked if it was really private or not in the file It says that it is private and it says that it is public, so I don't know where the error could be, but it has to be something either in the program or in the forge.