Using the draw.io plugin, I can create, edit and save a diagram successfully, however, when I publish my confluence page, I see "Error: Invalid descriptor" in place of my image.
The draw.io .png and .xml files have been successfully added to my page, but confluence seems to be failing to locate them.
When I go back in and edit my page the draw.io macro is still there, but when I edit it it behaves like a 'blank' draw.io drawing.