The Quest just disappeared and can't be accessed from archives either, Quinn says "Restore another memorial first" on her activities. Can't progress New Light any further and can't get exotic and quests from Quinn. Very frustrating since I just bought the DLC.. :(
More pictures of the issue here:
https://ibb.co/fQz62dG
https://ibb.co/3cFx9xb
https://ibb.co/7JBpPXY
https://ibb.co/vxbhwd2