Error: Tried to construct an object without a GType; are you using GObject.registerClass() when inheriting from a GObject type?
Stack trace:
Settings@/home/.../.local/share/gnome-shell/extensions/wsmatrix@martin.zurowietz.de/Settings.js:23:5
buildPrefsWidget@/home/.../.local/share/gnome-shell/extensions/wsmatrix@martin.zurowietz.de/prefs.js:144:19
_init@resource:///org/gnome/Shell/Extensions/js/extensionsService.js:207:40
OpenExtensionPrefsAsync/<@resource:///org/gnome/Shell/Extensions/js/extensionsService.js:122:28
asyncCallback@resource:///org/gnome/gjs/modules/core/overrides/Gio.js:132:13
run@resource:///org/gnome/Shell/Extensions/js/dbusService.js:175:20
main@resource:///org/gnome/Shell/Extensions/js/main.js:19:13
run@resource:///org/gnome/gjs/modules/script/package.js:222:19
start@resource:///org/gnome/gjs/modules/script/package.js:206:5
@/usr/share/gnome-shell/org.gnome.Shell.Extensions:1:17
Getting this errror on Ubuntu 20.04 after installing from the gnome estensions website