[SOLVED] "Error, no access to the page"

Hello, I have a problem that I am not sure if it is in Joomla, CB or infrastructure. I have now installed 2x the CB, latest version. Everywhere I see only green, no errors within the CB. BUT

The link to the registration does not work. When I call register, the message "Error, no access to the page" (Translated from German) appears. This happens a) when you are not logged in and b) when you are already logged in as a user.

The register menu links from a submenu of the main menu to a CB menu "register", which then goes to
Index.php?option=com_users&view=registration.
I also tried the direct call. The files called are unchanged from 2/27 with the usual permissions.

I am grateful for any tip.

I also checked the other way to open registration:
index.php?option=com_comprofiler&view=registers
Same effect. Once registered, the menus work (except registration)

Problem solved. ... The problem was again sitting in front of the computer. I changed the CB-Login module and now it works. Under configuration - registration was set on NOI changed it to Yes and it worked