fixup

assets/javascripts/discourse/connectors/category-custom-settings/assign-settings.hbs

@@ -6,7 +6,7 @@
       <Input
         @type="checkbox"
         @checked={{readonly this.outletArgs.category.enable_unassigned_filter}}
-        {{on "change" (this.onChangeSetting value="target.checked")}}
+        {{on "change" this.onChangeSetting}}
       />
       {{i18n "discourse_assign.add_unassigned_filter"}}
     </label>

assets/javascripts/discourse/connectors/category-custom-settings/assign-settings.js

@@ -3,10 +3,10 @@ import { action } from "@ember/object";
 
 export default class AssignSettings extends Component {
   @action
-  onChangeSetting(value) {
+  onChangeSetting(event) {
     this.set(
       "outletArgs.category.custom_fields.enable_unassigned_filter",
-      value ? "true" : "false"
+      event.target.checked ? "true" : "false"
     );
   }
 }