Error when the customer wants to edit his invoice

[kolorslab]

Hi

I got a ContextErrorException when a customer wants to generate his invoice from his account. The prestashop release is 1.7.6.3.

the error seem to come from PDFGeneratorCore->Header()in tcpdf.php line 3536 because the pdf generation doesn't work.

In the Back-Office i got a 2nd error too but i can generate easily an invoice :

Notice à la ligne 2681 du fichier /xxx/xxx/www/shop/modules/dhlexpress/dhlexpress.php
[8] Undefined index: DOMESTIC

I don't have an idea how to resolve this bug.

Someone has ever see that problem?

Thanks for your feedback

Best!