When the fight against the Necron Throne World start, it is asked to capture strategic points.
But when I reach the second one I immediately get the 'mission failed' screen.

I tried to restart this mission multiples times, but always get stuck at this point.
Here's my save file : 0_1549721164700_QuickSave.sav

@thomasvg I had the same issue too. There must be a hidden time limit otherwise it can't be explained. Try to capture the points as fast as you can and you will succed. At least it worked for me.

Thank you, it worked ! Indeed, it seem there was a time limit to avoid.
Again, my thanks, I would not have found it on my own.