if it says internal error it may be either your player data is corrupted or your world is. if you did it legit and its not your player data, you will have to reset the world hope that helps
I feel like that with the new server system mojang will force you to buy from servers they host and change login servers so you can't use reg servers. I'm just saying with the whole Craftbukkit thing this seems a bit crazy but u never know mojang could pull a sneaky dirty move. im just saying and this is the first time I thought of this
I reccomend you use the plugin called group manager for managing permission. But for the zones where u can't enter, etc you have to download the plugin called worldguard on the bucket website and world guard requires worldedit. Also I recommend essentials
You could get like a 500 mb server I use pytohost and it's $3 for 500 mb. Anyways eiter get it port forwarded or simply get one to save the aggravation
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or for adding a group to the user:
/pex group <group name> user add <username>
not too sure if u need this hope it helps....
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