[REJECTED] Suramar main questline bugged

[Tiborwow]

WoW Freakz link: http://www.wowhead.com/quest=40008/the-only-way-out-is-through
Bug description: Hi.This is my first bug report so im new to this.But i have a question(bug) about specific legion quest.It is very important quest.Main suramar questline.I progressed to the quest linked above.And i escorted Thalysstra to the cave.But the quest stayed grey and i couldnt complete it.i asked people on global chat,and they said it worked fine.so i abandoned quest from my quest log,but now i cant find it again.I cant start the quest again and im stuck.Without this questline finished, i cant unlock world quest which is one of main source to progress in legion.Im not sure if im posting my problem on right thread,if not please show me where i can get this kind of support.In game name of char is Questa.
Proof: /

Update @ 24-12-2017, 23:29:11

A quick update.Kind person from global guided me in depths for a problem, after which i was able to complete the quest.sorry for your time.
Marry christmas!