PayPal integration

Dear friends,

I am in trouble with PayPal Payment.
As a client, when entering my access-code PayPal asks for creating a new PayPal account.
I tried several Client-IDs but it doesn´t work with any.
You may check it out here:
https://terminvergabe.jba-essen.de/index.php/form
By the way - everything worked fine a week ago.
I did not make any changes but since today it won´t work anymore.

Regards
Thomas

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