I have recently inherited a Drupal 7 site on Pantheon.io. None of the admin logins that work flawlessly in the Live environment work in either Test or Dev. I have pushed/pulled code and DB between the three to make sure they are all identical, but the logins still fail in Test and Dev. Any thoughts or suggestions would be greatly appreciated.
After more hours than I care to admit, I came to realize that the issue was very simple... The Pantheon Dashboard's links to "site admin" go to the
http:// site and NOT the
https:// site, therefore, none of the addresses were resolving correctly. The live site automatically redirects
http:// traffic to
https:// so it works just fine.