Can't seem to find my main quest

Hi, just like the title says I can't find my main quest. I already got my levl 15 class quest done, but afterwards there is no more quest. Im either stuck or thee is a problem here that I can't seem to see any quest available at all. Also, trying to get the flying card but I cant because my main quest its either lagged or glitching or something is happening to it. I want the the adventurous guild and nothing. Please help I have a Marauder level 15.

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Regards,
Melemyth