Membership registration form only works in Pop-up mode

Registration form only works in Pop-up mode. The “original membership form” just redirects to the same page in the other option.

Your help on these issues as well is greatly appreciated. I have spent a ton of time and have had loads of issues with this plugin.

I have tried the WP themes, disabling plugins, all the usual things and have had to restore the DB once. I am about ready to bail.