$activityParams = [
'subject' => $subject,
'campaign_id' => $campaign_id,
- 'source_contact_id' => CRM_Core_Session::singleton()->getLoggedInContactID(),
+ 'source_contact_id' => CRM_Core_Session::getLoggedInContactID(),
'activity_type_id' => CRM_Core_PseudoConstant::getKey('CRM_Activity_BAO_Activity', 'activity_type_id', 'Print PDF Letter'),
'activity_date_time' => date('YmdHis'),
'details' => $html_message,