I have the same problem with a customer of mine.
When I go to https://mydomain.com/wp-admin it redirects to https://myinstalldomain/user/wp-login.php?redirect_to=http%3A%2F%2Fmydomain.com%2Fwp-admin%2F&reauth=1
Once there i cannot login. When entering credentials and pressing enter I am just returned to login screen at the same adress as above.
However, if I use this adress; https://myinstalldomain/user/wp-login it works.
How can this be fixed??
It used to work….
