Guild Wars 2

I am doing Nevermore IV, but there there seems to be a bug. In “Combine Raven and Spirit” I have taken the Primed Raven and a Vision Crystal to the Raven Shaman’s Power Source, but I can’t do anything. I have tried logging on and off and changed map a couple of times, but no.

I’ve had problem the entire week. My computer crashes at the exactly same moment in Point of no Return. Happened 4-5 times now. I am quite annoyed.