Hello, @cairngormstudios. Thanks for reaching out.
I suppose, when you’re talking about some issues, are you referring specifically to the black background in the converted popup on this screenshot?
If yes, I can suggest you to verify if you have set correctly the Target Format values of your Convert to PDF action. If your popup size differs (is smaller) that the Target/Custom format you’ve set, you can get some issues with the converted element.
One more suggestion, to press the “convert to PDF” button when the page position is top. When you press the “convert” button, the plugin makes a “screenshot” of your page/popup. And when you have scrolled the page/popup to the top and pressed “convert” - you should not see the black screen issue.
Also, I would like to ask you to share more information on your problem. Can you please send screenshots of your Convert to PDF action (full details) and the screenshot of the popup element properties (width/height)? This can help to fund the solution for your case.
I have tried to recreate your case on this test page. Please take a look at my popup/convert to PDF action properties as on the workable example. I suppose it can be useful:
We have tested this page on macOS and Windows devices - converts fine.
Hope to hear from you soon