Login works only with username but not with e-mail address

Nextcloud version: 19.0.0
Operating system and version: Ubuntu 20.04
Installed via Docker

The login windows shows me to login with username or e-mail, but only the login with the username works.
Why is there a login via e-mail address not possible?

there has been discussions about that on the forum. please feel free to search the forum.
thank you.

1 Like

Hm… I have searched the forum and been unable to find any discussions regarding using email for logins. All I find is people requesting the functionality.

Cold you please share a link?

I actually also have not found any topic regarding this issue.
Could you share a link to it?