Did some more testing and it is only happening the first time I mouse over the default Pitbull configuration screen. After I got the error once I can open the pitbull configuration screen with no problem at all.
I have done all the things you said... delete my directories, redownload the lib, reinstall all my mods but still getting this error. I am using the "without external" setting.
Anyone can help me?
without externals means without libraries (the external files that are included with the addon when you select with externals). So, if you have been updating without externals, you haven't been updating your libraries like you were told to.