I'am also having the same problem. When it first happen, I though the files where corrupt so I reinstalled the mp mod. After the 1st failed attempt to launch, I decide to is to restart the computer, thinking that this will fix it problem. I did this processes 3 times and then remembered that ats did some update. I decide to go on the forms and look if anybody else is having problems and I was correct. I have been watching the forms since the beginning but never decided to say something. i was thinking that a lot more people will say something but I was wrong. So now I am.