I found the cause for my problem: it was a security feature from Strato which should prevent guestbook spam… I deactivated the option and I could create a new user and edit older ones.
Here is a link to a german speaking support document from Strato: https://www.strato.de/faq/article/136/Fehler-503-%28Error-‘Service-unavailable’%29-bei-der-Verwendung-von-POST-Requests.html
Hi @chris281186,
did you resolve the error?
I just got it while I implement a few functions and I could not resolve the problem until now.
Tim
