When I save my mob I don't know why but there is an error message that say ''your workspace contains mod elements that Don't compile properly''
and when I changed my java file to rigged or villager now there was no more error message
If someone read this, I hope he's gonna help me because i'm only 12 and I'm not very experienced.
Issue comments
I suggest you check our tutorials collection playlist on our YouTube channel which contains many examples and tutorials that can help you get started with MCreator: https://www.youtube.com/playlist?list=PLAeL-oIFIEngE6jRgFYeFMfuj8WQsO3Ei
There is Blockbench naming tutorial on this list too.
Set the model name in BlockBench before exporting, not in Java file if you do not know how to do this:
sans_monster is not same as custom_model