Fatal error: Uncaught Error: Class 'MantisPlugin' not found in C:\inetpub\wwwroot\mantis\core\classes\MantisWikiPlugin.class.php:29 Stack trace: #0 C:\inetpub\wwwroot\mantis\core\classes\MantisCoreWikiPlugin.class.php(29): require_once() #1 {main} thrown in C:\inetpub\wwwroot\mantis\core\classes\MantisWikiPlugin.class.php on line 29