snap: ImportError: cannot import name ‘decodestring’ from ‘base64’ (/usr/lib64/python3.9/base64.py)
According to:
The snap is using classic confinement, and it appears to be using a Python from /usr. So it is likely that it works on some distro releases and not others. In particular, anything where the default python3 is >= 3.9, since the function in question was removed in that release 5 after having been deprecated since 3.1.
So it is definitely something that needs to be fixed in the snap, either by not using deprecated features or by using the Python from the base snap rather than the host system.