Square: Connection loops and does not proceed

simply when configuring, goes into a loop and no progress

I created a test form and tried connecting to Square both in Test Mode and Live Mode and was able to connect successfully. Please note that a popup should window should appear which asks for your Square's email and password. Make sure you do not have a popup blocker.

How-to-Integrate-Form-with-Square

If you're still having an issue, please share a link to a screencast/video of the issue.