/usr/bin/gnome-shell:11:meta_logical_monitor_get_scale:get_window_geometry_scale_for_logical_monitor:meta_window_wayland_get_geometry_scale:meta_surface_actor_wayland_get_scale:meta_surface_actor_wayland_sync_state

The Ubuntu Error Tracker has been receiving reports about a problem regarding gnome-shell. This problem was most recently seen with package version 3.26.1-0ubuntu4, the problem page at https://errors.ubuntu.com/problem/ef253d8ee2ebd808212fd8237c453ae98c7c1387 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/.