Try to repair the game.
(Origin > Game Library > right click MELE > Repair)
(Steam > Game Library > right click at MELE > Properties > Local Files > Verify integrity of game files.)
My apologies, but I did forget to mention that trying to use the repair option was the first thing I tried, which is when I then tried to uninstall/re-install the game to see if that would fix it.
NP, but then there is not much else you could try except for loading an older save and maybe try a different approach, meaning doing the missions in a different order.
