Fatal error: Uncaught Error: Class "IMAppLib_Lock_LockAbstract" not found in C:\SHC\xampp\htdocs\shc_mobile_backend\packages\imapplib\src\IMAppLib\Lock\Semaphore.php:15 Stack trace: #0 {main} thrown in C:\SHC\xampp\htdocs\shc_mobile_backend\packages\imapplib\src\IMAppLib\Lock\Semaphore.php on line 15