Frontend only logins

I can't confirm this, but I suspect it might be a configuration issue.

Have you set up your services correctly?

parameters:
  session.storage.options:
    cookie_domain: '.ddev.site'
    cookie_domain_bc_mode: true

This ensures the cookie is shared across all subdomains. Make sure both the front-end and back-end are using the same domain, differentiated only by a subdomain.

I can get this response if I try user/logout (if I am logged in). What we currently have setup is a absolute url such as https://test-drupal.ddev.site/user/logout. This redirects the user to Drupal backend for confirmation. That works without issue using the Drupal process.

I was trying to to test this, but actually failed logging out.

I figured there is an issue with logouts. It used to work before, so probably https://www.drupal.org/node/2822514 → caused it.

When the logout is not working, you stay logged in, and the /user/login route shows access denied. Maybe this is what is happening here?
Please try to reproduce with the gitpod online demo and provide reproduction steps.

created 🐛 User logout confirmation form is not supported (d10.3+) Active for the logout issue