Hi Everyone, (@caevan, @hope)
Going to splash in here with some feedback for you…
I had the SAME problem (error), which seems to be related to toggling OFF and ON Image URL Mapping.
Once you toggle between Image URL Mapping the error is there for ‘good’.
I HAVE THREE TEST SITES SO IS HERE WHAT HAPPENED NEXT. BP Gallery was working fine on the other two sites, ‘UNTIL’ I again toggled on Image URL Mapping.
Now site two is broken as well, while site three continues to work perfectly. Unfortunately, once you toggle URL Mapping and get the error, you cannot back out of it. Seems even if I remove BP Gallery and reinstall, the error persists.
Glad these are only test sites. It’s a great plugin, I hope understanding this source of the error will help others – until, of course, you figure out a fix.
Here is a .jpg of the error before and after toggling URL Mapping.
https://www.box.com/shared/ayxi6w4y5umo0wygee6b
Hope all that helps.
DolphinGuy