Look for a in a nook west of Norion's room to open a shortcut back to the main area. Correct Shard Placement
Alternatively, click the gate in the console and type unlock or disable to remove the barrier. : The Cause Rielle Door Fix (Workaround)
If you are stuck behind a gate within the ruin, check the . Some gates are controlled by specific floor pressure plates that only trigger once or require you to approach from a higher level. Look for a in a nook west of