Cannot Craft Hoppers in Realms

When you go to craft a hopper in the realm, and put all the materials in the crafting table, nothing pops up. And when you look up the recipe in the crafting recipes book, it brings the hopper up highlighted as red, as well as all the materials and so on, all highlighted red, despite actually having all the crafting ingredients. CAN craft Hoppers in singleplayer worlds though.