Change Profile during Registration not accessable

Dear Support Team

I have a problem with the registration. Users could always change thier profile in the first step of the registration process.

Now, they can still click on Profil wechseln? (change profile) but will end on a log-in page. The have no more access to the page where they can change to one of the various profile categories.

All registration pages and also the profile page are set for Public access. But it is not working anymore.

Can you please assist!

Thank you very much.
Patrick