Fatal error: Uncaught Error: Class 'TimelineEvent' not found in C:\inetpub\wwwroot\mantis\core\classes\IssueStatusChangeTimelineEvent.class.php:30
Stack trace:
#0 {main}
thrown in C:\inetpub\wwwroot\mantis\core\classes\IssueStatusChangeTimelineEvent.class.php on line 30