CRM_Core_Exception: Could not find valid value for src in /var/aegir/platforms/civicrm-4.7/sites/all/modules/civicrm/CRM/Utils/Request.php on line 199
Exception trace
#	Function	Location
0	CRM_Utils_Request::retrieve()	/var/aegir/platforms/civicrm-4.7/sites/all/modules/civicrm/CRM/Utils/Request.php:199
1	CRM_Utils_Request::retrieveValue()	/var/aegir/platforms/civicrm-4.7/vendor/civicrm/uk.co.vedaconsulting.mosaico/CRM/Mosaico/Utils.php:397
2	CRM_Mosaico_Utils::processImg()	/var/aegir/platforms/civicrm-4.7/sites/all/modules/civicrm/CRM/Core/Invoke.php:285
3	CRM_Core_Invoke::runItem()	/var/aegir/platforms/civicrm-4.7/sites/all/modules/civicrm/CRM/Core/Invoke.php:69
4	CRM_Core_Invoke::_invoke()	/var/aegir/platforms/civicrm-4.7/sites/all/modules/civicrm/CRM/Core/Invoke.php:36
5	CRM_Core_Invoke::invoke()	/var/aegir/platforms/civicrm-4.7/sites/all/modules/civicrm/drupal/civicrm.module:471
6	civicrm_invoke()	/var/aegir/platforms/civicrm-4.7/includes/menu.inc:527
7	menu_execute_active_handler()	/var/aegir/platforms/civicrm-4.7/index.php:21
8	{main}