Add error nullification in sources

js/stores/user_store.js

@@ -28,6 +28,7 @@ class UserStore {
 
     onSuccessFetchCurrentUser({users: [user]}) {
         this.userMeta.invalidateCache = false;
+        this.userMeta.err = null;
         this.currentUser = user;
     }
 

js/stores/whitelabel_store.js

@@ -27,6 +27,7 @@ class WhitelabelStore {
 
     onSuccessFetchWhitelabel({ whitelabel }) {
         this.whitelabelMeta.invalidateCache = false;
+        this.whitelabelMeta.err = null;
         this.whitelabel = whitelabel;
     }