Bukkit

Describe to us the issue that you're having:
bpermissions webgui will not connect

Which steps will reproduce this problem?:
1)logging into webgui
2)checking console
3:connection error

Do you have an error log of what happened?
05.01 21:40:21 [Server] SEVERE at java.lang.Thread.run(Thread.java:722)
05.01 21:40:21 [Server] SEVERE at de.bananaco.webgui.RequestHandler.run(RequestHandler.java:59)
05.01 21:40:21 [Server] SEVERE at de.bananaco.webgui.JSONStringWriter.encode(JSONStringWriter.java:32)
05.01 21:40:21 [Server] SEVERE java.lang.NoSuchMethodError: de.bananaco.bpermissions.api.World.getAll(Lde/bananaco/bpermissions/api/util/CalculableType;)Ljava/util/Set;
05.01 21:40:21 [Server] SEVERE Exception in thread "Thread-22"

Which version of bPermissions are you using?: (Please don't say "latest"!!!)
v2.10.1
Which version of CraftBukkit?: (Please don't say "latest"!!!)
"Mod: Craftbukkit 1.4.6-R0.1 (2553)"
Which OS?
Windows 8, and Windows 7