I hope you are well today and thank you for your question.
I checked your site https://www.huisenthuis.nl/thuismeubelenkopen/ and found that you are using Custom Load Pop Over loading method which loads pop over separately from the page via a custom front end ajax call but i didn’t see any ajax call in the browser network console.
Can you just try using Page Footer or External Loader Pop Over loading method from the path Admin -> Pop overs -> Settings
I just wanted to check your site again for finding another solution for it but when i visited your site i got the following error message.
Unable to load the webpage because the server sent no data.
Error code: ERR_EMPTY_RESPONSE
Can you just check it so that i can troubleshoot it?
Can you just make following simple debugging so that it can help us to find bottle neck of problem.
– Disable all plugin except WordPress PopUp and check it
– Switch to default WordPress theme Twenty Twelve or Twenty Thirteen and check it
– Set WP_DEBUG to true in your WordPress wp-config.php file and check whether there’s any error message
I found the same thing using External Load after WordPress 3.7 / 3.7.1
External load worked fine up to then.
Checking page source the java file popoverlegacy.js and the inline script wasn’t loading.
Switched to Page Footer, and re-saved the pop up box as well. Working again 🙂
Thanks for letting us know that, it happens some time depending on the theme that one Pop Over loading method doesn’t work but another works therefore we have provided different three pop over loading methos which you can choose from Pop Over Settings.