'NoneType' object has no attribute 'remove_iq_callback'

Versions

• OS: Arch Linux
• GTK Version: 3.24.29
• PyGObject Version: 3.40.1
• GLib Version : 2.68.0
• python-nbxmpp Version: 2.0.2
• Gajim Version: 1.3.2

Traceback

Traceback (most recent call last):
  File "/usr/lib/python3.9/site-packages/nbxmpp/dispatcher.py", line 498, in _timeout_check
    func(self._client, None, **user_data)
  File "/usr/lib/python3.9/site-packages/nbxmpp/task.py", line 313, in _async_finished
    self._set_finished()
  File "/usr/lib/python3.9/site-packages/nbxmpp/task.py", line 214, in _set_finished
    self._finalize()
  File "/usr/lib/python3.9/site-packages/nbxmpp/task.py", line 320, in _finalize
    self._client._dispatcher.remove_iq_callback(self._iq_id)
AttributeError: 'NoneType' object has no attribute 'remove_iq_callback'

Steps to reproduce the problem

I clicked on my "Messages" window and this error popped up...