AuthDecorator must implement both the old UserAuthInterface and the new UserAuthenticationInterface

Reverting to 3.0 also fixes it.

This looks like the problem -- committed but not released yet.

https://www.drupal.org/project/commerce/issues/3464144 📌 Replace UserAuthInterface with UserAuthenticationInterface for Drupal 11 Support Fixed

I cannot revert to 3.0 because I already have Drupal 10.3

I'm on Drupal 3.1 and mail_login 3.0 still seems to work. You just get a warning on /admin/modules/update.

I'm using Composer for updates and I'm not comfortable hacking it as a workaround.

The problem is that Drupal 10.3 implemented a revised User Authentication Interface, and Commerce Checkout is still using the old one. There is very little difference between the old and the new so the solution is to update the User Authentication decorator service in mail_log to implement both the old and the new interfaces.

A new PR has been created and the update applied. This works for me.

Can confirm the MR resolves the issue.

I looked at https://git.drupalcode.org/project/mail_login/-/merge_requests/17 and while the approach of adding an extra interface is correct IMHO, the legacy method doesn't support this module's functionality. So you don't get the error but you can't login with the email address either. Furthermore upon successful login (when the username is used, not mail), the authenticate method should return the uid of logged-in user, but it does return a bool.

zaporylie → changed the visibility of the branch 3464301-compatibility to hidden.

zaporylie → changed the visibility of the branch 3464301-compatibility to active.

https://git.drupalcode.org/project/mail_login/-/merge_requests/19 is to address the comment in #13.

Tested against Commerce 2.x and 3.x. While 2.x works 3.x needed some work done in 🐛 Login checkout pane doesn't fully support UserAuthenticationInterface Needs review . With provided fix both versions are supported.

Merged and tagged as 4.0.3. Thanks, everyone.