> [15:21:39 INFO]: blijgozertje issued server command: /f upgrades
> [15:22:00 INFO]: blijgozertje issued server command: /f reload
> [15:22:00 INFO]: [Factions] [Factions v1.6.9.5-U0.2.1-RC-1.6.2-RC-2-stef] Starting conversion of legacy material in config to 1.13 materials.
> [15:22:01 INFO]: blijgozertje issued server command: /f upgrades
> [15:22:01 ERROR]: null
org.bukkit.command.CommandException: Unhandled exception executing command 'f' in plugin Factions v1.6.9.5-U0.2.1-RC-1.6.2-RC-2-stef
at org.bukkit.command.PluginCommand.execute(PluginCommand.java:47) ~[server.jar:git-TacoSpigot-unknown]
at org.bukkit.command.SimpleCommandMap.dispatch(SimpleCommandMap.java:144) ~[server.jar:git-TacoSpigot-unknown]
at org.bukkit.craftbukkit.v1_8_R3.CraftServer.dispatchCommand(CraftServer.java:670) ~[server.jar:git-TacoSpigot-unknown]
at net.minecraft.server.v1_8_R3.PlayerConnection.handleCommand(PlayerConnection.java:1250) [server.jar:git-TacoSpigot-unknown]
at net.minecraft.server.v1_8_R3.PlayerConnection.a(PlayerConnection.java:1065) [server.jar:git-TacoSpigot-unknown]
at net.minecraft.server.v1_8_R3.PacketPlayInChat.a(PacketPlayInChat.java:45) [server.jar:git-TacoSpigot-unknown]
at net.minecraft.server.v1_8_R3.PacketPlayInChat.a(PacketPlayInChat.java:1) [server.jar:git-TacoSpigot-unknown]
at net.minecraft.server.v1_8_R3.PlayerConnectionUtils$1.run(SourceFile:13) [server.jar:git-TacoSpigot-unknown]
at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511) [?:1.8.0_212]
at java.util.concurrent.FutureTask.run(FutureTask.java:266) [?:1.8.0_212]
at net.minecraft.server.v1_8_R3.SystemUtils.a(SourceFile:44) [server.jar:git-TacoSpigot-unknown]
at net.minecraft.server.v1_8_R3.MinecraftServer.tickScheduler(MinecraftServer.java:812) [server.jar:git-TacoSpigot-unknown]
at net.minecraft.server.v1_8_R3.MinecraftServer.B(MinecraftServer.java:820) [server.jar:git-TacoSpigot-unknown]
at net.minecraft.server.v1_8_R3.DedicatedServer.B(DedicatedServer.java:384) [server.jar:git-TacoSpigot-unknown]
at net.minecraft.server.v1_8_R3.MinecraftServer.A(MinecraftServer.java:752) [server.jar:git-TacoSpigot-unknown]
at net.minecraft.server.v1_8_R3.MinecraftServer.run(MinecraftServer.java:649) [server.jar:git-TacoSpigot-unknown]
at java.lang.Thread.run(Thread.java:748) [?:1.8.0_212]
Caused by: java.lang.NullPointerException
at com.massivecraft.factions.SavageFactions.createItem(SavageFactions.java:563) ~[Factions-2019-09-17--13-05.jar:?]
at com.massivecraft.factions.zcore.fupgrades.FUpgradesGUI.openMainMenu(FUpgradesGUI.java:28) ~[Factions-2019-09-17--13-05.jar:?]
at com.massivecraft.factions.cmd.CmdUpgrades.perform(CmdUpgrades.java:34) ~[Factions-2019-09-17--13-05.jar:?]
at com.massivecraft.factions.zcore.MCommand.execute(MCommand.java:126) ~[Factions-2019-09-17--13-05.jar:?]
at com.massivecraft.factions.cmd.FCommand.execute(FCommand.java:71) ~[Factions-2019-09-17--13-05.jar:?]
at com.massivecraft.factions.zcore.MCommand.execute(MCommand.java:112) ~[Factions-2019-09-17--13-05.jar:?]
at com.massivecraft.factions.cmd.FCommand.execute(FCommand.java:71) ~[Factions-2019-09-17--13-05.jar:?]
at com.massivecraft.factions.zcore.MCommand.execute(MCommand.java:130) ~[Factions-2019-09-17--13-05.jar:?]
at com.massivecraft.factions.zcore.MPlugin.handleCommand(MPlugin.java:283) ~[Factions-2019-09-17--13-05.jar:?]
at com.massivecraft.factions.zcore.MPlugin.handleCommand(MPlugin.java:251) ~[Factions-2019-09-17--13-05.jar:?]
at com.massivecraft.factions.SavageFactions.handleCommand(SavageFactions.java:597) ~[Factions-2019-09-17--13-05.jar:?]
at com.massivecraft.factions.SavageFactions.onCommand(SavageFactions.java:608) ~[Factions-2019-09-17--13-05.jar:?]
at org.bukkit.command.PluginCommand.execute(PluginCommand.java:45) ~[server.jar:git-TacoSpigot-unknown]
... 16 more