Fatal error: Uncaught Error: Call to undefined function require_api() in C:\wamp\www\mantisbt\plugins\XmlImportExport\ImportXml\Issue.php:26 Stack trace: #0 C:\wamp\www\mantisbt\plugins\XmlImportExport\ImportXml.php(26): require_once() #1 {main} thrown in C:\wamp\www\mantisbt\plugins\XmlImportExport\ImportXml\Issue.php on line 26