FIX: Make it compatible with sub-folder installs

assets/javascripts/discourse-assign/initializers/extend-for-assigns.js.es6

@@ -133,9 +133,11 @@ function initialize(api) {
   api.modifyClass("model:topic", {
     @computed("assigned_to_user")
     assignedToUserPath(assignedToUser) {
-      return this.siteSettings.assigns_user_url_path.replace(
-        "{username}",
-        Ember.get(assignedToUser, "username")
+      return Discourse.getURL(
+        this.siteSettings.assigns_user_url_path.replace(
+          "{username}",
+          assignedToUser.username
+        )
       );
     }
   });

config/settings.yml

@@ -11,7 +11,7 @@ plugins:
   unassign_on_group_archive: false
   assigns_user_url_path:
     client: true
-    default: "u/{username}/activity/assigned"
+    default: "/u/{username}/activity/assigned"
   assign_mailer_enabled: false
   remind_assigns_frequency:
     client: true