Answers.Body: <p>In order to fix this regression, you need to apply this <a href="https://github.com/civicrm/civicrm-core/commit/6454ff5467e8c31bd32747a72169f15d640f1319" rel="nofollow noreferrer">tiny patch</a>, which wasn't merged in time for the 4.7.28 release.</p>
  
  <p>Cheers,
  Olivier;</p>
  
Answers.ContentLicense: CC BY-SA 3.0
Answers.CreationDate: 2017-12-14T05:42:57.320Z
Answers.LastActivityDate: 2017-12-14T05:42:57.320Z
Answers.UserDisplayName: Olivier Tétard
Body: <p>I cannot view Activities on a Contact's Activities Tab, or my activities on my CiviCRM Dashboard. In both cases I receive the following error:</p>
  
  <p><em>DataTables warning: table id=DataTables_Table_0 - Invalid JSON response. For more information about this error, please see <a href="http://datatables.net/tn/1" rel="nofollow noreferrer">http://datatables.net/tn/1</a></em></p>
  
  <p>I am using CiviCRM 4.7.28 in Wordpress 4.9.1. I have the following Extensions active in CiviCRM:</p>
  
  <ul>
  <li>iATS Payments 1.6.1</li>
  <li>Summary Fields v. 3.1.1</li>
  <li>Extended Report v. 3.0</li>
  <li>Displays relationships in the contact summary v. 1.2</li>
  <li>Mailchimp v. 2.0.1 </li>
  </ul>
  
Tags: <wordpress><activities><upgrade>
Title: DataTables Warning: Cannot view Activities after upgrade to 4.7.28
ThreadText: # DataTables Warning: Cannot view Activities after upgrade to 4.7.28
  
  (Asked by: username_0 on 2017-12-14)
  
  I cannot view Activities on a Contact's Activities Tab, or my activities on my CiviCRM Dashboard. In both cases I receive the following error:
  
  *DataTables warning: table id=DataTables\_Table\_0 - Invalid JSON response. For more information about this error, please see <http://datatables.net/tn/1>*
  
  I am using CiviCRM 4.7.28 in Wordpress 4.9.1. I have the following Extensions active in CiviCRM:
  
  * iATS Payments 1.6.1
  * Summary Fields v. 3.1.1
  * Extended Report v. 3.0
  * Displays relationships in the contact summary v. 1.2
  * Mailchimp v. 2.0.1
  
  **Tags:** wordpress, activities, upgrade
  
  
  ---
  
  ## 1 answers
  
  ### Answer by username_1 on 2017-12-14. Score: 0 | Accepted answer
  
  In order to fix this regression, you need to apply this [tiny patch](https://github.com/civicrm/civicrm-core/commit/6454ff5467e8c31bd32747a72169f15d640f1319), which wasn't merged in time for the 4.7.28 release.
  
  Cheers,
  username_1;
  
  
  ---
  
  