Error message displayed while pressing "Connect"/ "Follow"/ "Block" button in Contacts Center portlet

• Type: Bug
• Status: Closed
• Resolution: Duplicate
• Affects Version/s: 2.1.X CE
• Fix Version/s: 2.1.X CE
• Component/s: Social Office Dashboard, Social Office Dashboard > Contacts Center
• Labels: None
• Environment: Tomcat 7.0.42 + MySQL 5.5.21 Portal master GIT ID: e8d521fd617e574e6d61b4d1f032124a23c07b2f.; Plugins master GIT ID: 55973a89a2d85c6c50c17d79df8bf5ac5fb73488.
• Fix Priority: 4
• Affects Portal Version/s:
  6.2.0 CE GA1

Steps to reproduce:

1. Start a clean portal, login as "Test" user.
2. Add a user like "test1".
3. Deploy contacts-portlet to portal, add it into page (Contacts Center).
4. Select "test1", press "Connect"/ "Follow"/ "Block" button (snapshot.png).
5. Check the display of page.

Expected result:
No error message displayed.

Actual result:
The error message "an-error-occurred-while-retrieving-the-users-information" flash on the screen, and then the action will be successfully completed. There are no exception on terminal.