So, i tried to start MPQ on steam as always. Game will launch but is loading forever saying "insufficient storage", which is really something i am really unable to understand (i have plenty of space on both my hard drive and RAM). I never experienced this message as long as i am playing which is like a whole decade. I tried to verify game files and even reinstall the game but sadly with no effect.
Aaaand... restarting PC fixed it somehow... odd.