That's not where you need to go after talking to Anephas.
After Anephas has spoken to you, head for the doorway (not too far away) which was in the room with the fallen columns. You wouldn't have been able to open that door before, but after Anephas, it will open.
The Pillar to Kerah is supposed to stay up after you've finished exploring that area. No reason to go back.
Wyv
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