I've inherited a WP site that has started having issues in the past month or so. When you click on Log in, it tries to re-direct you back to the main page, and after a while you get a "too many redirects" error. No one trying to log in is able to, regardless of OS, location or user status (admin vs. regular user). I have tried the following steps, found in other similar help topics:
1. Cleared cache/cookies
2. Disabled plugins
a. When I did this, the log in button disappeared completely.
3. Disabled any .htaccess files I could find
4. There is a plugin called "Login-Logout" installed that I have re-downloaded and reinstalled.
5. Disabled themes
a. When I did this, the entire page disappeared.
Nothing seems to affect the redirect at all. I'm not a WordPress expert, and this is driving me crazy. I have noticed that when I hover over the log in button, it shows that it will redirect, and when I right click and view page source it also shows the redirect, like it was part of the HTML code. I have searched for hours through the individual files, but can't find anything that could be causing this.
Does anyone know anything else I can try? Obviously I don't have access to the admin dashboard, but I can FTP into the files.