SAP SLC - Supplier Registration - prompt to enter user credentials
I am experiencing a strange behaviour in the supplier registration.
We're on 2.0 running the buy side and sell side in a standalone scenario.
This is just an internal demo system.
Whenever I open the registration page (with external alias / SICF service directly, doesn't matter) I experience a certificate error (which is normal if you sign your own certificate) and then I am asked to enter user credentials.
This should definitely not happen, if I repeatedly hit "cancel", after like 10 attempts the supplier registration page is displayed.
The configuration is according to the customizing guide (RFC bg user, pw maintained, not locked, correct roles, SICF maintained correctly / external alias maintained).
Does this happen because of the certificate error, because the authentification cycle is being interupted?
If you could advise on that, I'd be deeply thankful.