TypeError when opening settings

[SvenMoenig]

I just got this error when trying to open the settings for this:

The settings of extension blur-me@nunchucks had an error:

TypeError: this._sigma_scale is null

Stack trace:

_init@/home/moenig/.local/share/gnome-shell/extensions/blur-me@nunchucks/prefs.js:36:7
buildPrefsWidget@/home/moenig/.local/share/gnome-shell/extensions/blur-me@nunchucks/prefs.js:165:10
_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:132:22
run@resource:///org/gnome/Shell/Extensions/js/dbusService.js:177:20
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:206:8
@/usr/share/gnome-shell/org.gnome.Shell.Extensions:1:17

I'm on Debian 11 bullseye.