Paypal Error, Solution?

Heya there

so ive tried to buy a few games from G2A but it wont let me checkout
ive done myself some research on Google which could tell me that it can happen if your
paypal account is not verified or linked with a bank problem is my paypal account is verified and linked with
my own bank

so if someone here happend to had the same problem please tell me how u fixed it :/

https://gyazo.com/90dea9dd7a65c2a4a4f662510a55a762
(Its in dutch )

Regards & thanks in advance