Dreamscape related quest bug

[Yureadingthis]

I was about to to the dreamscape quest and i entered the nightmare raid zone once then quit without clearing the map, as i was about to buy the nightmare raid zone again for 2,000 gold it only says "you already have a buff of that type" and won't let me enter the nightmare raid zone anymore.

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[Futumsh]

You probably just need to go to bed (and use the purple thing that shows up).