This looks like a related question https://github.com/micheleg/dash-to-dock/issues/1705

copy log here:
Apr 09 01:36:01 satriani gnome-shell[118687]: meta_monitor_manager_get_logical_monitor_from_number: assertion '(unsigned int) number < g_list_length (manager->logical_monitors)' failed
Apr 09 01:36:01 satriani gnome-shell[118687]: meta_workspace_get_work_area_for_monitor: assertion 'logical_monitor != NULL' failed
Apr 09 01:36:01 satriani gnome-shell[118687]: meta_monitor_manager_get_logical_monitor_from_number: assertion '(unsigned int) number < g_list_length (manager->logical_monitors)' failed
Apr 09 01:36:01 satriani gnome-shell[118687]: meta_workspace_get_work_area_for_monitor: assertion 'logical_monitor != NULL' failed
Apr 09 01:36:01 satriani gnome-shell[118687]: meta_monitor_manager_get_logical_monitor_from_number: assertion '(unsigned int) number < g_list_length (manager->logical_monitors)' failed
Apr 09 01:36:01 satriani gnome-shell[118687]: meta_workspace_get_work_area_for_monitor: assertion 'logical_monitor != NULL' failed
Apr 09 01:36:01 satriani gnome-shell[118687]: meta_display_get_monitor_in_fullscreen: assertion 'monitor >= 0 && monitor < n_logical_monitors' failed
Apr 09 01:36:01 satriani gnome-shell[118687]: meta_monitor_manager_get_logical_monitor_from_number: assertion '(unsigned int) number < g_list_length (manager->logical_monitors)' failed
Apr 09 01:36:01 satriani gnome-shell[118687]: meta_workspace_get_work_area_for_monitor: assertion 'logical_monitor != NULL' failed
...
Apr 09 01:36:14 satriani gnome-shell[118687]: Unhandled promise rejection. To suppress this warning, add an error handler to your promise chain with .catch() or a try-catch block around your await expression. Stack trace of the failed promise:
                                                _loadFile@resource:///org/gnome/shell/ui/background.js:493:20
                                                _load@resource:///org/gnome/shell/ui/background.js:523:14
                                                _init@resource:///org/gnome/shell/ui/background.js:283:14
                                                Background@resource:///org/gnome/shell/ui/background.js:239:4
                                                getBackground@resource:///org/gnome/shell/ui/background.js:614:30
                                                _createBackgroundActor@resource:///org/gnome/shell/ui/background.js:785:49
                                                BackgroundManager@resource:///org/gnome/shell/ui/background.js:711:37
                                                _createBackgroundManager@resource:///org/gnome/shell/ui/layout.js:461:27
                                                _updateBackgrounds@resource:///org/gnome/shell/ui/layout.js:507:34
                                                _monitorsChanged@resource:///org/gnome/shell/ui/layout.js:571:14
Apr 09 01:36:14 satriani gnome-shell[118687]: Unhandled promise rejection. To suppress this warning, add an error handler to your promise chain with .catch() or a try-catch block around your await expression. Stack trace of the failed promise:
                                                _loadFile@resource:///org/gnome/shell/ui/background.js:493:20
                                                _load@resource:///org/gnome/shell/ui/background.js:523:14
                                                _init@resource:///org/gnome/shell/ui/background.js:283:14
                                                Background@resource:///org/gnome/shell/ui/background.js:239:4
                                                getBackground@resource:///org/gnome/shell/ui/background.js:614:30
                                                _createBackgroundActor@resource:///org/gnome/shell/ui/background.js:785:49
                                                BackgroundManager@resource:///org/gnome/shell/ui/background.js:711:37
                                                _createBackgroundManager@resource:///org/gnome/shell/ui/layout.js:461:27
                                                _updateBackgrounds@resource:///org/gnome/shell/ui/layout.js:507:34
                                                _monitorsChanged@resource:///org/gnome/shell/ui/layout.js:571:14
Apr 09 01:36:15 satriani gnome-shell[118687]: Unhandled promise rejection. To suppress this warning, add an error handler to your promise chain with .catch() or a try-catch block around your await expression. Stack trace of the failed promise:
                                                _loadFile@resource:///org/gnome/shell/ui/background.js:493:20
                                                _load@resource:///org/gnome/shell/ui/background.js:523:14
                                                _init@resource:///org/gnome/shell/ui/background.js:283:14
                                                Background@resource:///org/gnome/shell/ui/background.js:239:4
                                                getBackground@resource:///org/gnome/shell/ui/background.js:614:30
                                                _createBackgroundActor@resource:///org/gnome/shell/ui/background.js:785:49
                                                BackgroundManager@resource:///org/gnome/shell/ui/background.js:711:37
                                                _createBackgroundManager@resource:///org/gnome/shell/ui/layout.js:461:27
                                                _updateBackgrounds@resource:///org/gnome/shell/ui/layout.js:507:34
                                                _monitorsChanged@resource:///org/gnome/shell/ui/layout.js:571:14