[DUPLICATE] [Broken Isles - Suramar] A Change of Seasons

[Samdal]

Wowhead quest link: http://www.wowhead.com/quest=43502/a-change-of-seasons
WoW Freakz quest link: https://www.wow-freakz.com/quest_helper.php?quest=43502&&&&name=a-change-of-seasons
Bug description: I have finished A Growing Crisis Achievement , including The Emerald Nightmare: The Stuff of Dreams (killed xavius, etc). I have EXALTED reputation with the nightfallen, i have fed mana to all three Thalysra, Valtrois and Oculeth, i have went out of the cave and came inside again, i have log out and entered the game again....but still the quest A Change of Seasons is not offered
Proof: https://imgur.com/8pKOJ9n https://i.imgur.com/8pKOJ9n.jpg