Error while compiling: Quests.cs(412,31): error CS1061: Type `ItemCraftTask' does not contain a definition for `owner' and no extension method `owner' of type `ItemCraftTask' could be found. Are you missing an assembly reference?

Yeah was just about to post about this, myself. I tried reinstalling it, but it seems it's truly broken.

same issue here

Merged post

have a go at this https://umod.org/community/quests/49654-last-rust-update-quests-not-working?page=1#post-3 seems to fix it