Ascendency Trials

I have been having this issue before the patch and just tried it after the patch and the same issue is happening. I go into the boss area of the trials. The game freezes and I get a popup.

Exception
"Art/Models/MONSTERS/SaltGolem/attachments/SanctumRattlecageRocks/RattlecageRocks.ast": Failed to uncompress animation 0

Please help, I really don't want to have to go through the trials again but I will if I have to.