My particular problem stemmed from reconfiguring python3 to point to python3.7 instead of python3.6 via update-alternatives. Logging into terminal-only mode (Ctrl + F3), setting update-alternatives to use the system version of python3.6 again, and rebooting solved the issue.
My particular problem stemmed from reconfiguring python3 to point to python3.7 instead of python3.6 via update- alternatives. Logging into terminal-only mode (Ctrl + F3), setting update-alternatives to use the system version of python3.6 again, and rebooting solved the issue.