Fatal error: Uncaught Error: Class 'ModbusTcpClient\Packet\ModbusFunction\ReadCoilsRequest' not found in C:\xampp\htdocs\src\Packet\ModbusFunction\ReadInputDiscretesRequest.php:23 Stack trace: #0 {main} thrown in C:\xampp\htdocs\src\Packet\ModbusFunction\ReadInputDiscretesRequest.php on line 23