Error when attempting to save

[malesandro]

Hello! Excellent plugin. I am testing the index.html that comes in the zip. When I click on the save icon, I get an error that reads "Uncaught TypeError: Cannot call method 'apply' of null ". This began happening, after I set the wPaint path. Before that, the error I was getting was that it couldn't find upload.php, which seemed logic since it was working in another path.

Any ideas, into what might be happening? Thanks, Mariano