Applet doesn't load in Mac OSX

I have a applet that was running in both mac and windows, after some more development it stopped loading in mac, but loads in windows.

Now my big problem is that doesn’t load, and also there aren’t any errors in the console, simply appears the error message on the applet (Error. Click for details) but there aren’t any details.

Any tips on what I can do to try to find out the errors?