We have a main site at example.com
example.com
. Logging into example.com/admin
example.com/admin
works fine there.
But on a testing site at test.example.com/admin
test.example.com/admin
I cannot log into the admin without first deleting all example.com
example.com
cookies. Then I can log in, but as soon as I log into example.com/admin
example.com/admin
my next click on the test server kicks me back to the login page.
I don't know if this affects customer logins.
Is there some configuration in the main site or testing site that would solve this problem?