So doing /ps info yields this error http://pastebin.com/0DQZCtL6

and doing /ps allow or /ps allowall yields this error "Not a valid command or insufficient permissions"

Not sure if its something with the server or just the plugin.

This is weird, I am still unable to reproduce that error. It works just fine for me. Can you provide instructions that I can follow to make this happen, starting with a clean server with just PS on it with the default config?

Absolutely! But its late right now so I will get started on it as soon as I can.

Okay so using the latest 1.8 Spigot build using Java 8 with 2Gb of ram and latest build of PS. With no changes to the config. Tried with both debug mode on and off. Debug yielded no results.
/ps info works while being in a city protection (Diamond block), but when out of a field it says "Command not recognized".
Error msg for doing /ps info: http://pastebin.com/f4K8SqR2

Doing /ps allow or /ps allowall it says "Not a valid command or insufficient permissions". But doesn't give any errors.
Also it doesn't announce that you have left the field.

EDIT: Just tried this out with Craftbukkit 1.8. Same errors, no changes.
EDIT1: Getting the same "Not a valid command or insufficient permissions" for /ps remove and /ps removeall.

Just tested this. Used GroupManager and added your perms. Tried both PS 9.7.1 and PS 9.8.0 and everything works fine. Cannot reproduce your error. One odd thing is that the line numbers in the error output you linked don't match up with the code. If i were to guess, I'd say that you have multiple versions of PreciousStones.jar in your plugins folder and some old version is loading up by mistake.

Just looked in my server files. I did forget to remove an old version of PS. Silly me :P. After removing one of the files the commands now work.
Thank you for the help phead420.

What do your permissions look like? Did all this work before with an older version of PS with the same permissions setup? Or has it never worked for you. That would help narrow down if its a bug in the code or If you have a bad permission setup.

I am using Essentials groupmanager, the rank Builder is the rank that has all the base perms.
http://pastebin.com/ja1WD4Q8
In my test server I was only using OP to test it out. Will report if I get the same errors with an older version.

EDIT: Using the same server version but using the 9.7.0 update of PS. Using no perms just op, got the same error.