I’ve just come back to this feature, having switched it of (as unusable) a few years ago.
When I add a saved grid to my toolbar and press ‘save’ it works as expected. However, when you try and apply said saved grid I just get a modal window popping up showing a lot of (unrendered) HTML that is effectively giving the helpful error message ‘Error’.
Any idea what I’m missing here?
PS… it also happens if I use the persistent state option, but this time on the save!