It works very well. Thanks a lot for your help! And yes I will update my PHP version. However I work locally with InstantWP. I have to find out how to do it.
Thank you again for your help
Thank you for your quick reply. I just applied the amendment you advocated. But now, another error message is displayed.
Here it is:
Fatal error: Class ‘\ Dompdf \ Positioner \ Block’ not found in C: \ Users \ GRANIT-DAO \ Desktop \ InstantWP_4.5 \ iwpserver \ htdocs \ wordpress \ wp-content \ plugins \ woo-pdf-invoice-builder \ vendor \ dompdf \ dompdf \ src \ Frame \ Factory.php on line 283
An idea maybe? =)
Hoping to post in the good section