Hi Y,
I might have a similar problem. I have issues with the Paypal Login option like many other users seem to have (Relying Party Validation error: redirect_uri provided in the request does not match with the registered redirect_uri. Please check the request.), but also the normal Paypal checkout options have an issue with a bad link. It sends to https// ... and it misses the ":" sign in this. The server cannot be found and as a result no payments can be made
Hope you find a solution soon! I'll be checking here.
Best,
Meri