Cannot progress main story due to server disconnect

[Niceologist]

Date & Time: 7/28/21, 8:00pm CST
Frequency: Once
World name: Sargatanas
Character name: The Niceologist
Class/Level: Dancer, 63
Party or solo: Party
Area and coordinates: Azys Lla
Steps:
1. During the quest 'Heavensward' on the step 'Use the Duty Finder to confront Thordan VII in the Singularity Reactor.'
2. While completing the trial 'The Singularity Reactor' and after completing the fight, immediately upon clicking the 'Exit' button to leave the instance the Sargatanas world went down.
3. Upon logging back in, the quest step was not completed. After successfully completing the trial again, the quest step still remains incomplete.

My best guess is that I was supposed to see a cutscene after exiting the instance, but didn't because of the server going down. Now I am essentially progress locked since I cannot abandon a main story quest.

If it is possible to reset the quest that would be great. Regardless, any help would be appreciated. Thanks!