Wynnexacavation Site A Problem

I didn't know if I should put this in bug reports or something else but the quest just doesn't work. It says to go to Vade but then he tells me to finish my assignment/quest so I dunno what to do rn.
(Can't send images yet so imma just quote it.)
1. Return and talk to Excavator Vade
2. What are you still doing here? Go finish your assignment! It's written in your quest book.
I finished the riddles part.

 

Theres a bunch of times the questbook tells you to "» Talk to Excavator Vade."
What did you do prior to the when the questbook last said that?
Im assuming you got the yellow crystal because you said u did the riddles?

 

Did you pick up the yellow crystal dropped by the boss? If not proceed to go and fight him again to get the crystal before talking to vade.

 

I didn't get the yellow crystal, how do I go fight the boss again?

 

Just enter the temple again and go through it.