I have to move and update a very old Joomla-1.5 website. Since I moved it, the frontend login doesn't work anymore but the backend login does. When I try to log in, the page is just reloading. It doesn't matter if I use wrong or right login data.
In the database, I get entries in the session table but they do not contain any information about the user. So it doesn't seem to be a session issue.
Old site: http://christen-im-gesundheitswesen.de/
Does anyone have any idea where I can look next?