AttributeError: 'RevertableList' object has no attribute 'append'

[KennedyMcMillan]

Hello guys. I'm decompile game script "script.rpyc" in game "The Elevator Game with Catgirls" with using tool "unrpyc-py3" and i get error:
~/Desktop/unrpyc-py3: python unrpyc.py -d script.rpyc
Decompiling script.rpyc to script.txt...
Error while decompiling script.rpyc:
Traceback (most recent call last):
File "/home/christopher/Desktop/unrpyc-py3/unrpyc.py", line 200, in worker
return decompile_rpyc(filename, args.clobber, args.dump, decompile_python=args.decompile_python,
File "/home/christopher/Desktop/unrpyc-py3/unrpyc.py", line 164, in decompile_rpyc
ast = read_ast_from_file(in_file)
File "/home/christopher/Desktop/unrpyc-py3/unrpyc.py", line 137, in read_ast_from_file
data, stmts = magic.safe_loads(raw_contents, class_factory, {"_ast", "collections"})
File "/home/christopher/Desktop/unrpyc-py3/decompiler/magic.py", line 602, in safe_loads
encoding=encoding, errors=errors).load()
File "/usr/lib/python3.10/pickle.py", line 1213, in load
dispatchkey[0]
File "/usr/lib/python3.10/pickle.py", line 1681, in load_appends
append = list_obj.append
AttributeError: 'RevertableList' object has no attribute 'append'

Anyone help pls?