Quote Originally Posted by cacoeman View Post
my square_handler appends the following code after the .php (square_handler.php?code=sq0cgp-j_F4unDPtGZ02XK5gVKs1Q&state=5c7806a1d350a#_=_) None of that extra stuff is my account creds. I changed to True as well on thatsquare_handler.php file and the word failure is all that shows up, as mentioned by radiowave above.
Those extra parameters/code after the ".php" in the URL are sent from Square, and are part of the handshake involved in setting the token between your site and Square's servers.

This afternoon I'll try to simulate the "failure" response you're talking about. Maybe they've recently changed something that's causing it? I'll post back when I have some findings.