Object .Gjs_ui_workspaceThumbnail_ThumbnailsBox (0x562b87f15c10), has been already disposed — impossible to get any property from it. This might be caused by the object having been destroyed from C code using something such as destroy(), dispose(), or remove() vfuncs.
== Stack trace for context 0x562b749ab400 ==
#0 7ffcf9acf840 b file:///usr/share/gnome-shell/extensions/[email protected]/src/modScaleThumbnails.js:26 (1969987b4240 @ 33)
#1 7ffcf9acf980 b resource:///org/gnome/shell/ui/workspacesView.js:693 (b33a4b083d0 @ 433)
#2 562b74a75738 i resource:///org/gnome/shell/ui/workspace.js:856 (1516dc0c1740 @ 378)
#3 562b74a756b0 i resource:///org/gnome/shell/ui/workspace.js:808 (1516dc0c16a0 @ 17)
#4 562b74a75618 i resource:///org/gnome/shell/ui/workspacesView.js:1014 (b33a4b08d80 @ 129)
#5 562b74a75588 i resource:///org/gnome/shell/ui/overviewControls.js:699 (1516dc07aa60 @ 50)
#6 562b74a75500 i resource:///org/gnome/shell/ui/layout.js:373 (1969987cefb0 @ 22)
#7 562b74a75470 i resource:///org/gnome/shell/ui/overview.js:650 (1516dc0778d0 @ 164)
#8 562b74a753f0 i resource:///org/gnome/shell/ui/overview.js:636 (1516dc077880 @ 12)
#9 562b74a75370 i resource:///org/gnome/shell/ui/overviewControls.js:750 (1516dc07ac90 @ 55)
#10 7ffcf9ad6dd0 b resource:///org/gnome/shell/ui/environment.js:84 (b33a4b56ba0 @ 39)
#11 562b74a752e8 i resource:///org/gnome/shell/ui/environment.js:250 (2408b078f8d0 @ 14)
#12 562b74a75258 i resource:///org/gnome/shell/ui/init.js:21 (196998770ba0 @ 48)