Stuck on multiplayer loading screen

I played ME3 in offline mode and now I am stuck on MP loading screen. All DLCs worked fine in SP during offline session and I didn't' launch MP.

I have a modified mount.dlc file. The modification forces each MP DLC to load during SP. With this and some other modifications I was able to use MP powers in SP. Everything was good in online mode, but after the offline session I can't load MP. Though, SP works and MP powers still work too in SP.

I also can't access Downloadable content menu on the main screen when the game launches. 

Is there any way to launch multiplayer again? Is this problem connected with Origin?