Hi,
Just wanted to open an issue to see about an update here for python 3.10. This error occurs because collections moved MutableMapping in python 3.10.
Seems a workaround until then may be have the following before importing cloudstorage, but not ideal long term:
import collections
if sys.version_info.major == 3 and sys.version_info.minor >= 10:
from collections.abc import MutableMapping
else:
from collections import MutableMapping