Crash: Updating screen events. Creating a villiger that offers invalid item

So, i have been messing with the villigers and commands so i tried if they could sell someone's head. Unfortunately, i did it wrong.
Here is a command i used:

/summon Villager ~-2 ~0 ~0 {Profession:3,CustomName:BLACKSMITH,CustomNameVisible:0,Offers:{Recipes:[ {maxUses:13,buy:{id:388,Count:5},sell:{id:283,Count:1,tag:{ench:[{id:16,lvl:9},{id:20,lvl:6}],display:{Name:Molten Gold Sword}}}},{maxUses:13,buy:{id:388,Count:1},sell:{id:280,Count:1,tag:{ench:[{id:16,lvl:5}],display:{Name:Whuppin Stick}}}},{maxUses:13,buy:{id:388,Count:2},sell:{id:skull 1 3 {SkullOwner:Dinnerbone},Count:1,tag:{ench:[{id:16,lvl:5},{id:dirt,lvl:10}],display:{Name:}}}},]}}

I'm sorry if this isn't a bug, sorry if this was ment to happen. Make sure to watch a video.