Hello,
I am having the EXACT same problem.
Prestashop 1.7.5.2, Prestashop Checkout module 2.0.6
Tried prestashop support, just got the standard "talk to paypal" treatment.
But I think it's the module's problem because everything is fine with my paypal merchant account. Hell, although the module reports this problem, my eshop can accept credit cards (through the prestashop checkout module!) but because the module thinks there's a problem, I am charged with standard paypal fees and not the advertised lower ones (which is why I installed the module in the first place!!!).
In my third message to prestashop support, I asked how can the problem be that my paypal account has a limitation (as they say), when their own checkout module let's me accept credit cards (just doesn't charge me with their advertised fees)!?! No answer..
Would appreciate any help from prestashop (or other)..
Thanks