Minecraft – Summon command error

I believe that Essentials overrides the /summon command.

To circumvent this, you can either do this in the bukkit.yml, or use a different command.

The command to override it is /minecraft:summon then the arguments as per normal. This works for other overridden commands, like /minecraft:give, if you prefer the default syntax/arguments.

You'll need to add a Count to your item, otherwise it defaults to 0 which is not valid:

/summon minecraft:item ~0 ~1 ~0 {Item:{id:"minecraft:diamond",Count:1b,Damage:1,tag:{display:{Name:"Nether Crafter",Lore:["This crafter uses the power of the nether","to fuse items"]},ench:[{}],crafter:1b}}}

You may also want to remove Damage:1, or it'll show up as a black/magenta square.