Dear, Is there any limitation of processing cart when too many items on cart? I am facing problem when I have something like 30 or more item on cart its giving error "paypal error [10001] - Internal Error. Timeout processing request " Thanks for your time and help.
I can't remember exactly, but you have to remove a certain module int he script. I recently had the problem with boxbilling. So, I am assuming the solution would be similar.
I can't exactly remember, I am googling it right now. Another thing, it might be because your site is slow as it is a timeout request. If you could provide your site, I can take a look.