Issue with the module after the install

[PierreFr_]

Hello,

 

I use paypal v3.10.10, and prestashop v1.6.1.6

 

I upgraded my prestashop from 1.5 to 1.6, beacause of the paypal module, as I needed the latest version. My problem is the following: when I try to configure the module, it seems "broken", as you can see on the attachments.

I already tried to uninstall and reinstall the module, but it didn't did a thing.

 

 

 

I don't know if it's linked, but I have another error, showing at the end of the check out, it says that there isn't any payment method available:

 

Do you know from where this might come from ? 

Thanks a lot,

Pierre