The internet went down, and when it came back, the mission I was doing disappeared (Rhapsody of Renewal).
the quest appears in the Quest Journal, but not in the feed. And also mission objectives are not available on the map.
Can you screenshot your Glacier Isle quest tab in the In Progress section? Maybe it’s there but the marker or feed checkbox was crossed off before you crashed?
If that’s not the case, the best I can suggest is you going to the quest walkthrough and retracing your steps through the NPCs until you finish the quest and move on to the next bit.
Hope the problem fixes eventually. 
Yep, my checkbox was crossed off.
I’m felling so dumb right now
Thanks for helping!