Hi all!
I'm using Prestashop 1.5.3. and I have the same problem in tcpdf. I have uploaded tcpdf folder in "Tools" directory, then replaced files:
config/define.inc.php
override/claasse/PDF.php
Product.php
Tools.php
This files I have donwloaded from this forum. But unfortunately I have an fatall error: "Class name must be a valid object or a string in Classes/controller/controller.php".
If someone have any idea, how can fix this problem, please help.
Thanks in advance.