ImportError: No JS module 'prefs' found in search path

[amixsty]

When i click on setting button , see that error.
already i installed everything you say in the manual way.

`The settings of extension [email protected] had an error:

ImportError: No JS module 'prefs' found in search path

Stack trace:

_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

`