Missing critical hitbox on The Sentinel

I’m having some issues with Aurelia the Baroness. I reached The Sentinel on TVHM and I’m not able to crit it with any of my weapons. Reloading the game doesn’t do anything, and I can’t defeat it as I’m 6 lvl lower than it. Does anyone else have the same issue, perhaps even a solution? Otherwise I’ll just have to grind the exp.

Unfortunately stage one Sentinel doesn’t have a Crit hitbox and it will resist Cyro. You will need to find another way of taking his health out while surviving his slam novas.

Thank you for the information. Don’t know how I missed that on my other playthroughs.