Error in crafting process.

When I try to craft an Holy Rune Helm, Armor or Weapon it keeps saying: "There is an error in the crafting process."

I do have all the items..

So yea.. bug/error :)

Restart the client.

The error occurs when there's a problem between client side (your view) and server side (server's view).  The problem should resync when you restart the client.