Fatal error: Uncaught Error: Interface "Amp\Sync\KeyedSemaphore" not found in C:\xampp\htdocs\epingame\vendor\amphp\sync\src\KeyedMutex.php:13 Stack trace: #0 {main} thrown in C:\xampp\htdocs\epingame\vendor\amphp\sync\src\KeyedMutex.php on line 13