client/general: fix certain error handlers

client/js/controllers/tag_categories_controller.js

@@ -22,9 +22,9 @@ class TagCategoriesController {
                 canSetDefault: api.hasPrivilege('tagCategories:setDefault'),
             });
             this._view.addEventListener('submit', e => this._evtSubmit(e));
-        }, response => {
+        }, errorMessage => {
             this._view = new EmptyView();
-            this._view.showError(response.description);
+            this._view.showError(errorMessage);
         });
     }
 

client/js/controllers/tag_controller.js

@@ -60,8 +60,8 @@ class TagController {
         e.detail.tag.save().then(() => {
             this._view.showSuccess('Tag saved.');
             this._view.enableForm();
-        }, response => {
+        }, errorMessage => {
-            this._view.showError(response.description);
+            this._view.showError(errorMessage);
             this._view.enableForm();
         });
     }

client/js/controllers/user_controller.js

@@ -128,7 +128,7 @@ class UserController {
                     ctx.controller.showSuccess('Account deleted.');
                 }
             }, errorMessage => {
-                this._view.showError(response.description);
+                this._view.showError(errorMessage);
                 this._view.enableForm();
             });
     }

client/js/controllers/user_registration_controller.js

@@ -23,8 +23,8 @@ class UserRegistrationController {
         user.save().then(() => {
             api.forget();
             return api.login(e.detail.name, e.detail.password, false);
-        }, response => {
+        }, errorMessage => {
-            return Promise.reject(response.description);
+            return Promise.reject(errorMessage);
         }).then(() => {
             const ctx = router.show('/');
             ctx.controller.showSuccess('Welcome aboard!');