M1 ended with failure even though all has been done (+feedback)

I played and finished mission 1 on hard of the nomads campaign today together with a friend. The mission is hard until the outpost gets destroyed. All that comes after that is fairly simple as mass production is rolling at that point and all new stuff that appears has a hard time beating 1000 t1 units (2 players with 500 unit limit) . We did not destroy the last base, as the ACU came out of it and got destroyed by that amount of units. That ended the mission, but the end was reported as mission failed. I am not sure which error that was.

[game.log](https://github.com/FAForever/NomadMissions/files/5240452/game.log)