Fatal error: Uncaught Error: Interface "Amp\Sync\Mutex" not found in C:\xampp\htdocs\Locsy\vendor\amphp\sync\src\StaticKeyMutex.php:7 Stack trace: #0 {main} thrown in C:\xampp\htdocs\Locsy\vendor\amphp\sync\src\StaticKeyMutex.php on line 7