When doing the Aetherblade Fractal, Kiel sometimes bugs and will not initiate the conversation to let you proceed to the final boss. She’ll just continue to follow you around. Her dying beforehand, and not getting resurrected, may be the cause as we did have to backtrack to get her.
I recommend removing the requirement to need her in the first place and making it so that interacting with that console next to the force field will let us into Frizz’s lab.