I worked on that problem, but unsuccessfull for the moment.
I made the image gallery plugin work from a server with the example from the krpano folder.
I found that, if I add to the simple example the vtourskin.xml of my virtualtour, the exemple gives the same error, error I do not have locally on computer.
So the problem should come from the vtourskin.xml , do you have an idea of the line ?
Here is the file:
#mce_temp_url#
error
link