Cannot edit contact details

I need to edit details of a contact, but when I save the contact I just get a message, that there has been an error - without further details.

I neither can delete the contact. So I am not able to create the contact again.

It is just this single contact - other contacts are working fine.

How can I solve this problem.

thx for help


1 Comment

Hello Bastian,

Good day! 

We have sent an email to discuss this at length with you to troubleshoot further.