Error: module 'collections' has no attribute 'MutableMapping' in OMEMO plugin

Versions

• OS: Debian testing
• Gajim version: 1.4.7
• Plugin version: 2.8.15
• GTK version: 3.24.34
• Python-nbxmpp version: 3.1.0

Steps to reproduce the problem

1. Upgraded Debian to latest version
2. Python is 3.10
3. OMEMO plugin started throwing this error
4. Tried searching internet, I am seeing other devs are having some backward-incompatible problems, so not directly related to OMEMO plugin, maybe my setup is broken somehow...

Expected behavior

OMEMO plugin should work

Actual behavior

OMEMO plugin cannot be enabled anymore