Permissionsex Help! Internal error D:

I've recently been trying to set up a server. I just started the permissions and got group default done, but commands such as /home and /spawn give me this error: An internal error occurred while attempting to perform this command. What do I do? Heres my perms:

groups:
default:
default: true
permissions:
- modifyworld.*
- essentials.kit
- essentials.kit.member
- modtrs.command.modlist
- modtrs.command.modreq
- modtrs.command.check.self
- telepads.list
- telepads.use
- essentials.balance
- essentials.pay
- essentials.afk
- essentials.helpop
- essentials.help
- essentials.msg
- essentials.warp
- towny.town.plot
- towny.town.resident
- ChestShop.shop.sell
- ChestShop.shop.buy
- essentials.sethome
- essentials.spawn
- essentials.help
- mywarp.warp.*
- essentials.depth
- essentials.msg
- essentials.back.ondeath
- essentials.compass
- essentials.rules
- essentials.back
- essentials.afk
- essentials.motd
- essentials.home
- essentials.list
- essentials.me
- essentials.kit
- modifyworld.*
options:
rank: '1000'