Checkout module configuration error

[TasteFood]

I would have this problem.

I'm at the first configuration of the "Prestashop Checkout" module for payments, the native one on the platform.

I created the Prestashop account on the form, I created the PayPal account, I connected the Checkout account and it did it without problems.

It creates problems for me when I go to connect the Paypal account which gives me the error of the attached image.

For test I installed the Paypal V. 5.1.2 module and the connection with paypal works perfectly.

I don't know how to fix the paypal link error on the Checkout form

I have Prestashop v. 1.7.6.5

Classic theme