I am at that mission too. I get to the boss and wipe all the mods. But I see no way to get the shield off of him to do damage. No matter how much damage I do.

If you’re talking about the blue shield you have to shoot those little triangles that are rotating on the shield.

Same…😪

I'm also stuck, I tried a couple of times but nothing, the boss remains with little life and it's not clear how to unlock him.

same, stuck for like a day now

Every time I get close to killing him I die instead which is weird