Maintenance for the week of March 16:
• [COMPLETE] ESO Store and Account System for maintenance – March 18, 6:00AM EDT (10:00 UTC) - 4:00PM EDT (20:00 UTC)
Let me guess, its the breach near the dolmen near Keelsplitter. Do a few other quests, leave Summerset, then come back. Sometimes that fixes it. Otherwise, have fun running that quest again. Can't believe they haven't fixed that.