Patrick Thyen wrote:

I want to create a product, containing the nginx plus repository.

This repo needs a client-ssl cert + client-ssl key, which i created in content credentials with the type "ssl certificate".

Afterwards the repo was created and the client key + client cert were assigned.
But when I sync the this product, I only get this error:

Output:
No new packages.

Errors:
RPM1004: Error retrieving metadata: A connection error occurred

I configured a new Repo in Foreman 1.23 + Katello 3.13 and now it worked perfectly fine.
I tested it with the nginx-plus repository.