Guild Wars 2

Chak killer -master
heart of throns act 3 story mission roots of terror
ok well did the story 6 or 7 times jump into the pit at the end and kill every thing still buged can not get the chak killer objectives 0/1 done .
i can not find any info on this part and would like to finish it . is it just broken ?

ok so finished it …. yeh you have to solo it and not be in a group
u will have 4 chak left over in the end