Unable to play Sacrifice beyond 2nd mission

[Yperkeimenos]

Hi all, after starting the Sacrifice Quest line ,i was unable to play beyond the second mission. The reason is that each time i try to run the "Explore Lua - Pavlov" mission ,i get constantly stuck in the loading screen. The game simply stops responding midway to loading the mission and i have to end the evolution engine process via the task manager. I have no problem playing any other part of the game including the normal/regular  Pavlolv spy mission. My system specs are as follows : 1)Windows 10 Home edition / 2) Amd A8-9600 Apu / 3) 8 gigs of DDR4 Ram / 3) Msi B350 Gaming plus motherboard.