'A Better Beginning' (Eos) bug

I reached the part in the mission where you're ok EOS and you find soem relics or whatever and then you activate one of them to sctivate a bridge to cross the lake. I activated it and as i walked across the bridge, it formed. Then in the centre, there was some toxic fluid or soemthing which I fell in and died from. When I hit Resume, I was spawned before the bridge, but the terminal to activate the bridge was no longer available. This is early in the campaign and is part of the main story, which i can no longer do. I tried flying off the planet and coming back or doing multiplayer and then coming back. It won't reset correctly and therefore I cannot do any more of the campaign