Guild Wars 2

It allows me to add the dark matter, grandmaster finishing kit, and ecto for discovery, and it says that the recipe is valid, but the craft button is grayed out. The icon is 6 question marks. Has anyone else been able to craft one of these?

I tried it after seeing it listed on wiki. Got same thing.

The recipe on wiki is incomplete. You also need 3 Creepy Jack O’Lanterns. Apparently the decoration is buggy though.

https://forum-en.gw2archive.eu/forum/support/bugs/Expensive-guild-decoration-unable-to-retrieve/