I’ve read a fair amount of stuff on this problem but haven’t been able to come up with a solid answer and am still experiencing trouble.
Setup: EE 2.6.1, MSM 2.1.5, running on Media Temple. Browser: Chrome. Notable modules/extensions/fieldtypes: Structure, Low Reorder, Playa, Matrix, Stash
Problem: Correct credentials redirects to login screen rather than CP Home.
Workaround: Clearing my browser cache (deleting cookies and emptying the cache) will allow me to log in. However this is not a tenable solution for myself or the client logging in. Also, this solution does not allow me to login to any of the sites (site2.com/admin.php, site3.com/admin.php) etc.
How do we fix this?