warning message after an activity is created
A warning is displayed when an activity is created - http://dmaster.demo.civicrm.org/civicrm/activity?reset=1&action=add&context=standalone
Warning: in_array() expects parameter 2 to be array, null given in CRM_Activity_Form_Activity->processActivity() (line 1102 of /srv/buildkit/build/dmaster/sites/all/modules/civicrm/CRM/Activity/Form/Activity.php).