The issue have now been fixed and you can proceed the quest. Since we have rewritten most of our plugins and fixed a lot of optimizations in our server core.. It also brought us bugs, but they are solved now.
Hey Kasvitieteilijä, this has been an on-going issue for a few weeks, at least. A few other members posted on the technical support Discord channel, but no response was given from any administrators.
We do apologize for our absence, I personally don't use discord much at all. Both me and Kevin have very busy lifes for the time being.
Anyone who has never made a mistake has never tried anything new.