Fatal error: Uncaught exception 'Exception' with message 'Cannot initialise FilePrintConnector.' in C:\Appserv\Apache2.2\htdocs\escpos\src\Mike42\Escpos\PrintConnectors\FilePrintConnector.php:37 Stack trace: #0 C:\Appserv\Apache2.2\htdocs\escpos\example\customer-display.php(20): Mike42\Escpos\PrintConnectors\FilePrintConnector->__construct('/dev/ttyACM0') #1 {main} thrown in C:\Appserv\Apache2.2\htdocs\escpos\src\Mike42\Escpos\PrintConnectors\FilePrintConnector.php on line 37