I have upgraded from 7.1 to 8.0.3 and the installation went pretty smoothly. The site runs but when I try to login it displays a page that just says
With a button that says "Return to Site"
There is an error that appears in the url
I am at a loss to determine what the cause of the error is. I have checked permissions, made sure the .net framework was up to date but all of this seemed OK.
Is there a log that I can look at to determine what might be happening.