What to do when you noticed that PopUp had stopped working, but recetly everyting was okay.
First of all, you need to exclude plugin or theme conflict. Please try to deactivate all your plugins one by one and check the issue. Thus you will find out which plugin causes the error. If it won’t help, try to switch temporarily to a standard WordPress theme. Afterwards let us know about the result.
Then, check your settings on the Main tab, especially these options: «Show on next pages», «Hide/Show Only for Countries», «Hide/Show Only for», «Hide/Show Only for Search Engines or Social Media», «Hide/Show Only for URL match», «Hide/Show Only for User Roles».
Most likely these settings were changed.