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

[luisferracini]

I had an error when trying to config, after install this extension, could someone help?

The settings of extension custom-osd@neuromorph had an error:

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

Stack trace:
  require@resource:///org/gnome/gjs/modules/esm/gi.js:16:28
  @gi://Json/:3:25
  _init/GLib.MainLoop.prototype.runAsync/</<@resource:///org/gnome/gjs/modules/core/overrides/GLib.js:266:34