Qrcode in laravel

i want to make qrcode, in there i can make it but i have something trouble when i want to change the format of qrcode to png file. but its only show symbol

here my view :

<?php echo QrCode::size(265)->generate($row->id) ?>

this qrcode i use :

"simplesoftwareio/simple-qrcode": "~1"

here my referance : http://ift.tt/28DiyJQ

can anyone help me ? or can someone give me solution ? before i change format to png :

and this after i change it :

via Chebli Mohamed