I'm getting an error when I try to send mass e-mail to users. Sending it to for example to an administrative usergroup does work. It happens when include all usergroups.
An exception occurred: Mysqli prepare error: MySQL server has gone away in /home/user/public_html/library/Zend/Db/Statement/Mysqli.php on line 77 1. Zend_Db_Statement_Mysqli->_prepare() in Zend/Db/Statement.php at line 115 2. Zend_Db_Statement->__construct() in Zend/Db/Adapter/Mysqli.php at line 381 3. Zend_Db_Adapter_Mysqli->prepare() in Zend/Db/Adapter/Abstract.php at line 478 4. Zend_Db_Adapter_Abstract->query() in XenForo/Model.php at line 218 5. XenForo_Model->fetchAllKeyed() in XenForo/Model/RoutePrefix.php at line 24 6. XenForo_Model_RoutePrefix->getPrefixesByRouteType() in XenForo/Model/RoutePrefix.php at line 37 7. XenForo_Model_RoutePrefix->getPrefixesForRouteCache() in XenForo/Link.php at line 389 8. XenForo_Link::_loadHandlerInfoForGroup() in XenForo/Link.php at line 306 9. XenForo_Link::_getPrefixHandler() in XenForo/Link.php at line 272 10. XenForo_Link::_buildLink() in XenForo/Link.php at line 81 11. XenForo_Link::buildPublicLink() in XenForo/Dependencies/Admin.php at line 180 12. XenForo_Dependencies_Admin->getEffectiveContainerParams() in XenForo/FrontController.php at line 563 13. XenForo_FrontController->renderView() in XenForo/FrontController.php at line 156 14. XenForo_FrontController->run() in /home/user/public_html/admin.php at line 13