Notification: Error in handle_event when clicking button

Versions

• OS: Windows 10
• GTK Version: 3.24.24
• PyGObject Version: 3.38.0
• GLib Version : 2.66.2
• python-nbxmpp Version: 2.0.1
• Gajim Version: 1.3.0

Traceback

Traceback (most recent call last):
  File "C:/msys64/home/appveyor/gajim/win/_build_root/mingw64/lib/python3.8/site-packages/gajim/gtk/notification.py", line 339, in _on_button_press
  File "C:/msys64/home/appveyor/gajim/win/_build_root/mingw64/lib/python3.8/site-packages/gajim/gui_interface.py", line 1194, in handle_event
  File "C:/msys64/home/appveyor/gajim/win/_build_root/mingw64/lib/python3.8/site-packages/gajim/common/app.py", line 366, in get_resource_from_jid
AttributeError: 'NoneType' object has no attribute 'split'

Steps to reproduce the problem

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