Settings can't be displayed

[battata]

Describe the bug When opening the extensions settings from the extensions website it displays an error.

Configuration (please complete the following information):

• GNOME Shell version 3.36.4
• Distribution Ubuntu 20.04
• Xorg session

Screenshots

Technical Details The settings of extension blyr@yozoon.dev.gmail.com had an error:

Error: Requiring GtkClutter, version none: Typelib file for namespace 'GtkClutter' (any version) not found

Stack trace:

@/home/eduardo/.local/share/gnome-shell/extensions/blyr@yozoon.dev.gmail.com/prefs.js:23:20
_init@resource:///org/gnome/Shell/Extensions/js/extensionsService.js:204:33
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

[yozoon]

Duplicate. For a solution see the README.md, or #2