/usr/bin/gnome-shell:11:g_type_check_instance_is_fundamentally_a:g_object_ref:st_theme_get_custom_stylesheets:ffi_call_unix64:ffi_call_int

[errors.ubuntu.com bug bridge]

The Ubuntu Error Tracker has been receiving reports about a problem regarding gnome-shell. This problem was most recently seen with package version 3.36.1-5ubuntu2, the problem page at https://errors.ubuntu.com/problem/7db21198c9a21745b60cc46aabafb2b7e636bf95 contains more details, including versions of packages affected, stacktrace or traceback, and individual crash reports.
If you do not have access to the Ubuntu Error Tracker and are a software developer, you can request it at http://forms.canonical.com/reports/.