13:48:23 [INFO] [LocalShops] Created: Shop "null" at [-45, 65, 260], [-42, 68, 263] 0 items - a57e0adf-c074-404a-aae5-946b11c75b3d
13:48:23 [SEVERE] null
org.bukkit.command.CommandException: Unhandled exception executing command 'shop' in plugin LocalShops v3.1.0
        at org.bukkit.command.PluginCommand.execute(PluginCommand.java:42)
        at org.bukkit.command.SimpleCommandMap.dispatch(SimpleCommandMap.java:168)
        at org.bukkit.craftbukkit.CraftServer.dispatchCommand(CraftServer.java:386)
        at net.minecraft.server.NetServerHandler.handleCommand(NetServerHandler.java:777)
        at net.minecraft.server.NetServerHandler.chat(NetServerHandler.java:737)
        at net.minecraft.server.NetServerHandler.a(NetServerHandler.java:725)
        at net.minecraft.server.Packet3Chat.handle(Packet3Chat.java:33)
        at net.minecraft.server.NetworkManager.b(NetworkManager.java:226)
        at net.minecraft.server.NetServerHandler.a(NetServerHandler.java:100)
        at net.minecraft.server.NetworkListenThread.a(NetworkListenThread.java:78)
        at net.minecraft.server.MinecraftServer.w(MinecraftServer.java:537)
        at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:435)
        at net.minecraft.server.ThreadServerApplication.run(SourceFile:465)
Caused by: java.lang.NullPointerException
        at java.util.Hashtable.put(Unknown Source)
        at java.util.Properties.setProperty(Unknown Source)
        at com.milkbukkit.localshops.ShopManager.saveShop(ShopManager.java:595)
        at com.milkbukkit.localshops.commands.CommandShopCreate.process(CommandShopCreate.java:160)
        at com.milkbukkit.localshops.commands.ShopCommandExecutor.onCommand(ShopCommandExecutor.java:98)
        at org.bukkit.command.PluginCommand.execute(PluginCommand.java:40)
        ... 12 more