add error message

src/app/shared/chat/messages/contacts/contacts.page.html

@@ -31,19 +31,19 @@
   <div class="main-content">
     <ion-progress-bar class="position-absolute" type="indeterminate" *ngIf="loading"></ion-progress-bar>
     <ion-virtual-scroll [items]="userList" approxItemHeight="70px" [headerFn]="separateLetter">
-  
+
       <div class="item-divider" *virtualHeader="let header">
         <ion-label>{{ header }}</ion-label>
       </div>
-  
+
       <div (click)="openMessagesPage(user.wxFullName)" *virtualItem="let user" class="item-user cursor-pointer">
         <p>{{ user.wxFullName }}</p>
         <span class="icon">
           <ion-icon [class]="user.status" slot="end" name="ellipse"></ion-icon>
         </span>
       </div>
-  
+
     </ion-virtual-scroll>
   </div>
-  
+
 </ion-content>