Rename the data-controller to mbin. So it matched mbin_controller.js

templates/base.html.twig

@@ -61,7 +61,7 @@
         'subs-show': app.user is defined and app.user is not same as null and SUBSCRIPTIONS_SHOW is not same as V_FALSE and SUBSCRIPTIONS_SEPARATE is same as V_TRUE,
         'sidebars-same-side': app.user is defined and app.user is not same as null and SUBSCRIPTIONS_SEPARATE is same as V_TRUE and SUBSCRIPTIONS_SAME_SIDE is same as V_TRUE,
     }) }}"
-        data-controller="kbin notifications"
+        data-controller="mbin notifications"
         data-notifications-endpoint-value="{{ kbin_mercure_enabled() ? 'https://'~kbin_domain()~'/.well-known/mercure' : null }}"
         data-notifications-user-value="{{ app.user ? app.user.id : null }}"
         data-notifications-magazine-value="{{ magazine is defined and magazine ? magazine.id : null }}"