Answers.Body: <p>This has been <a href="https://issues.civicrm.org/jira/browse/CRM-21391" rel="nofollow noreferrer">recorded</a> and fixed in later version of CiviCRM. You can either apply <a href="https://github.com/civicrm/civicrm-core/pull/11693/files" rel="nofollow noreferrer">patch</a> manually to 4.7.31 or upgrade CiviCRM to 5.2.1.</p>
  
  <p>HTH</p>
  
  <p>Pradeep</p>
  
Answers.ContentLicense: CC BY-SA 4.0
Answers.CreationDate: 2018-06-17T19:49:31.863Z
Answers.Text: Thank you for this information. I applied the patch manually and it fixes the issue.
Answers.UserDisplayName: Sudesh
Answers.ContentLicense: CC BY-SA 4.0
Answers.CreationDate: 2018-06-11T17:15:07.397Z
Answers.LastActivityDate: 2018-06-11T17:15:07.397Z
Answers.UserDisplayName: Pradeep Nayak
Body: <p>I've running CiviCRM 4.7.31 on Wordpress 4.9.6.
  When selecting Events -&gt; Find Participants, I get the following warnings and a blank screen:</p>
  <blockquote>
  <p>Strict Standards: Static function CRM_Core_Task::permissionedTaskTitles() should not be abstract in .../wp-content/plugins/civicrm/civicrm/CRM/Core/Task.php on line 132</p>
  <p>Warning: Cannot modify header information - headers already sent by (output started at .../wp-content/plugins/civicrm/civicrm/CRM/Core/Task.php:132) in .../wp-content/plugins/civicrm/civicrm/CRM/Utils/System/Base.php on line 926</p>
  </blockquote>
  <p>Furthermore, when I go into the Events Dashboard, I get the following each time:</p>
  <blockquote>
  <p>Standards: Static function CRM_Core_Task::permissionedTaskTitles() should not be abstract in .../wp-content/plugins/civicrm/civicrm/CRM/Core/Task.php on line 132</p>
  </blockquote>
  <p>Is this a bug or an issue with my setup possibly?</p>
  
Tags: <civievent>
Title: Events -> Find Participants results in Warning: Cannot modify header information - headers already sent
ThreadText: # Events -> Find Participants results in Warning: Cannot modify header information - headers already sent
  
  (Asked by: username_0 on 2018-06-11)
  
  I've running CiviCRM 4.7.31 on Wordpress 4.9.6.
  When selecting Events -> Find Participants, I get the following warnings and a blank screen:
  
  > Strict Standards: Static function CRM\_Core\_Task::permissionedTaskTitles() should not be abstract in .../wp-content/plugins/civicrm/civicrm/CRM/Core/Task.php on line 132
  >
  > Warning: Cannot modify header information - headers already sent by (output started at .../wp-content/plugins/civicrm/civicrm/CRM/Core/Task.php:132) in .../wp-content/plugins/civicrm/civicrm/CRM/Utils/System/Base.php on line 926
  
  Furthermore, when I go into the Events Dashboard, I get the following each time:
  
  > Standards: Static function CRM\_Core\_Task::permissionedTaskTitles() should not be abstract in .../wp-content/plugins/civicrm/civicrm/CRM/Core/Task.php on line 132
  
  Is this a bug or an issue with my setup possibly?
  
  **Tags:** civievent
  
  
  ---
  
  ## 1 answers
  
  ### Answer by username_1 on 2018-06-11. Score: 1 | Accepted answer
  
  This has been [recorded](https://issues.civicrm.org/jira/browse/CRM-21391) and fixed in later version of CiviCRM. You can either apply [patch](https://github.com/civicrm/civicrm-core/pull/11693/files) manually to 4.7.31 or upgrade CiviCRM to 5.2.1.
  
  HTH
  
  Pradeep
  
  > **Comments:**
  > **username_0**: Thank you for this information. I applied the patch manually and it fixes the issue.  
  
  ---
  
  