On a fresh install i changed the default domain from domain.com to portal.domain.com and users have problems to login. If i change it back (default domain = domain.com) the problem disappears.
We can’t magically guess what you mean by “users have problems to login”
“problems” can mean anything … Please describe precisely what they attempt, how, and what happens exactly, without anything vague like “it doesn’t work” or “nothing happens”
But: i am sure that there is a problem that wasn’t there in past versions of YunoHost.
On a fresh YunoHost installation i setup domain.com as the first domain. Everything is fine.
Then i add a subdomain called portal.domain.com - everything is fine till here, too.
But if i change the main domain from domain.com to portal.domain.com (because i want users to login there) users are not able to login using firefox with their credentials (no message appears).
If i change back (main domain: domain.com) the error is gone.