Bukkit

What steps will reproduce the problem?
1.Using Spigot 1.8 install and load the plugin
2.Create Lobby and lobby spawn point eg:/sg lobby create Dome followed by /sg lobby setspawn Dome
3.select region (expand vert) containing arena and create arena for lobby eg: /sg arena create Dome Dome

What is the expected output? What do you see instead?
Expect to see plugin saving arena displaying successful percentage saved, instead see Map save of areana Dome in lobby Dome 0,0% over and over again.

What version of the product are you using?
Version Beta 1.9.2

Are you using a Spigot 1.8 patch build?
Spigot 1.8-R0 1 Dev Build

Do you have an error log of what happened?

02.12 23:45:51 [Server] WARN at me.maker56.survivalgames.reset.Save.run(Save.java:787)
02.12 23:45:51 [Server] WARN java.lang.NoSuchMethodError: com.sk89q.jnbt.ShortTag.<init>(Ljava/lang/String;S)V
02.12 23:45:51 [Server] WARN Exception in thread "Thread-21

What other plugin(s) do you have on the server?

Essentials
World Edit
World Guard
CoreProtect
Fe
FrameProtect
HolographicDisplays
Jobs
LWC
LibsDisguises
microblocks
Multiverse-core
NoCheatPlus
PermissionsEx
PlayerLaunchPad
PluginMetrics
ProtocolLibs
PwnFilter
SignShop
SimpleHelpTickets
SurvivalGames
Vault
Votifier

Please provide any additional information below.

Even if I stop and restart the server it has no effect, the map never completes saving, and I am still able to play the arena properly.

Same issue with similar error:

[13:58:14 INFO]: Thorns_Ofire issued server command: /sg arena save [13:58:14 WARN]: Exception in thread "Thread-34" [13:58:14 WARN]: java.lang.NoSuchMethodError: com.sk89q.jnbt.ShortTag.<init>(Lja va/lang/String;S)V [13:58:14 WARN]: at me.maker56.survivalgames.reset.Save.run(Save.java:787 )