Description of problem:
I was removing the cinnamon calander applet keyboard binding, I pressed the delete key to remove the set binding then pressed enter to save it. That's when the oops notification happened. An additional problem, is why is the keyboard binding in the applet and not in the keyboard settings menu, it took me forever to find this binding.

Version-Release number of selected component:
cinnamon-5.6.8-2.fc38

Additional info:
reporter:       libreport-2.17.10
executable:     /usr/share/cinnamon/cinnamon-settings/xlet-settings.py
package:        cinnamon-5.6.8-2.fc38
type:           Python3
uid:            27454
cgroup:         0::/user.slice/user-27454.slice/session-2.scope
cmdline:        xlet-settings '' '' '' '' '' '' '' '' '' '' '' '' '' '' '' '' '' '' '' '' '' '' '' '' '' '' '' '' '' '' '' '' '' '' '' '' '' '' '' '' '' '' '' '' '' '' '' '' '' '' '' '' '' '' '' '' '' '' '' '' '' '' '' '' '' '' '' '' '' '' '' '' '' '' '' '' '' '' '' '' '' '' '' '' '' '' '' '' '' '' '' '' '' '' '' '' '' '' '' '' '' '' '' '' '' '' '' '' '' '' '' '' '' '' '' '' '' '' '' '' '' '' '' '' '' '' '' '' '' '' '' '' '' '' '' '' '' '' '' '' '' '' '' '' '' '' '' '' '' '' '' '' '' '' '' '' '' '' '' '' '' '' '' '' '' '' '' '' '' '' '' '' '' '' '' '' '' '' '' '' '' '' '' '' '' '' '' '' '' '' '' '' '' '' '' '' '' '' '' '' '' '' '' '' '' '' '' '' '' '' '' '' '' '' ''
crash_function: on_key_release
interpreter:    cinnamon-5.6.8-2.fc38.x86_64
reason:         KeybindingWidgets.py:234:on_key_release:AttributeError: 'NoneType' object has no attribute 'group'
comment:        I was removing the cinnamon calander applet keyboard binding, I pressed the delete key to remove the set binding then pressed enter to save it. That's when the oops notification happened. An additional problem, is why is the keyboard binding in the applet and not in the keyboard settings menu, it took me forever to find this binding.
kernel:         6.2.15-300.fc38.x86_64
runlevel:       N 5
exception_type: AttributeError

Truncated backtrace:
KeybindingWidgets.py:234:on_key_release:AttributeError: 'NoneType' object has no attribute 'group'

Traceback (most recent call last):
  File "/usr/share/cinnamon/cinnamon-settings/bin/KeybindingWidgets.py", line 234, in on_key_release
    group = event.group
            ^^^^^^^^^^^
AttributeError: 'NoneType' object has no attribute 'group'

Local variables in innermost frame:
self: <KeybindingWidgets.CellRendererKeybinding object at 0x7f86f885cec0 (KeybindingWidgets+CellRendererKeybinding at 0x55f6f2e31d60)>
widget: <Gtk.Entry object at 0x7f86f887bec0 (GtkEntry at 0x55f6f2fcb6d0)>
event: None
display: <GdkX11.X11Display object at 0x7f86f887bf80 (GdkX11Display at 0x55f6f2aa43b0)>
keyval: 0

Potential duplicate: bug 1955365