@WT_2044 are you sure you are using the exact indgredients the quest book want ? A github issue is much more helpfull.
https://github.com/GTNewHorizons/NewHorizons/issues
thanks
server (2018/2/20)
Wooden Crossbow cannot be completed
Have you change it after (2018/2/20)
My English is poor
Other problems I will try to submit on "github"