protobuf → "TypeError: bases must be types"

Electrum tries importing something that throws an error. Here’s the context:

Traceback (most recent call last):
  File "/usr/bin/electrum", line 82, in <module>
    check_imports()
  File "/usr/bin/electrum", line 73, in check_imports
    from google.protobuf import descriptor
  File "/usr/lib64/python3.9/site-packages/google/protobuf/descriptor.py", line 47, in <module>
    from google.protobuf.pyext import _message
TypeError: bases must be types

Protobuf version Version: 3.20.1 Electrum 4.2.1

^{Perhaps this is only a Protobuf issue?}