Pop Up! settings "On specific URL" not working.

The Pop Up! plugin is working when no condition is selected. When I set "On specific URL" nothing happens. The URL has no "www", the closing "/" and the permalink is set to "post". I disabled the cache manager plugin. I simply don't get the pop over to work.
The "Pop Over loaded using" is using "Page Footer".
I have the WPMU DEV chat plugin loaded on the same page as widget.

Please advise.
Thank you.

I am attaching a screenshot w/o any conditions selected.