问题 I'm developing an aplication to manage multiples branches for a fast food locale, it's up in a shared hosting, and trying to use barryvdh/laravel-dompdf library to print in a thermal printer (client side) two tickets (one for invoice and other for order). The idea is when the invoice is registered, then show the options to print the two tickets. But right now the web print preview doesn't show, only register the invoice and log show this error 'PrinterController::pdf Invalid characters passed