Description of problem:
I was installing vlc through the console and was using cinnamon setting at the same time. Maybe, they were waiting for one another. I am not so sure.

Version-Release number of selected component:
cinnamon-3.8.1-1.fc28

Additional info:
reporter:       libreport-2.9.5
cmdline:        /usr/bin/python3 /usr/share/cinnamon/cinnamon-settings/cinnamon-settings.py
crash_function: onChanged
exception_type: AttributeError
executable:     /usr/share/cinnamon/cinnamon-settings/cinnamon-settings.py
interpreter:    python3-3.6.5-1.fc28.x86_64
kernel:         4.16.5-300.fc28.x86_64
runlevel:       N 5
type:           Python3
uid:            1000

Truncated backtrace:
cs_default.py:210:onChanged:AttributeError: 'NoneType' object has no attribute 'get_name'

Traceback (most recent call last):
  File "/usr/share/cinnamon/cinnamon-settings/modules/cs_default.py", line 210, in onChanged
    print("%s: " % info.get_name())
AttributeError: 'NoneType' object has no attribute 'get_name'

Local variables in innermost frame:
info: None
button: <cs_default.DefaultAppChooserButton object at 0x7fa710d234c8 (cs_default+DefaultAppChooserButton at 0x555734546e60)>
self: <cs_default.DefaultAppChooserButton object at 0x7fa710d234c8 (cs_default+DefaultAppChooserButton at 0x555734546e60)>

This is a private, duplicate bug report of bug 1571503. The report has been created because Bugzilla cannot grant access to a comment for a specific group.