[11:06:01 INFO]: [SkyWars] Loaded 0 Sign(s)!
[11:06:01 INFO]: [SkyWars] Loaded 2 ChestType(s)!
[11:06:01 INFO]: [SkyWars] Loaded 5 Kit(s)!
[11:06:01 INFO]: [SkyWars] Loaded 9 Cage(s)!
[11:06:01 ERROR]: Error occurred while enabling ProSkyWars v1.0 (Is it up to date?)
java.lang.IllegalArgumentException: Material cannot be null
        at com.google.common.base.Preconditions.checkArgument(Preconditions.java:143) ~[guava-33.3.1-jre.jar:?]
        at org.bukkit.inventory.ItemStack.<init>(ItemStack.java:150) ~[paper-api-1.21.5-R0.1-SNAPSHOT.jar:?]
        at org.bukkit.inventory.ItemStack.<init>(ItemStack.java:138) ~[paper-api-1.21.5-R0.1-SNAPSHOT.jar:?]
        at org.bukkit.inventory.ItemStack.<init>(ItemStack.java:125) ~[paper-api-1.21.5-R0.1-SNAPSHOT.jar:?]
        at org.bukkit.inventory.ItemStack.<init>(ItemStack.java:108) ~[paper-api-1.21.5-R0.1-SNAPSHOT.jar:?]
        at ProSkywars (3).jar/com.mineorigin.minigame.gamemanager.Trails.<init>(Trails.java:34) ~[ProSkywars (3).jar:?]
        at ProSkywars (3).jar/com.mineorigin.minigame.Main.loadTrail(Main.java:889) ~[ProSkywars (3).jar:?]
        at ProSkywars (3).jar/com.mineorigin.minigame.Main.onEnable(Main.java:282) ~[ProSkywars (3).jar:?]
        at org.bukkit.plugin.java.JavaPlugin.setEnabled(JavaPlugin.java:280) ~[paper-api-1.21.5-R0.1-SNAPSHOT.jar:?]
        at io.papermc.paper.plugin.manager.PaperPluginInstanceManager.enablePlugin(PaperPluginInstanceManager.java:202) ~[paper-1.21.5.jar:1.21.5-114-a1b3058]
        at io.papermc.paper.plugin.manager.PaperPluginManagerImpl.enablePlugin(PaperPluginManagerImpl.java:109) ~[paper-1.21.5.jar:1.21.5-114-a1b3058]
        at org.bukkit.plugin.SimplePluginManager.enablePlugin(SimplePluginManager.java:520) ~[paper-api-1.21.5-R0.1-SNAPSHOT.jar:?]
        at org.bukkit.craftbukkit.CraftServer.enablePlugin(CraftServer.java:653) ~[paper-1.21.5.jar:1.21.5-114-a1b3058]
        at org.bukkit.craftbukkit.CraftServer.enablePlugins(CraftServer.java:608) ~[paper-1.21.5.jar:1.21.5-114-a1b3058]
        at net.minecraft.server.MinecraftServer.loadWorld0(MinecraftServer.java:741) ~[paper-1.21.5.jar:1.21.5-114-a1b3058]
        at net.minecraft.server.MinecraftServer.loadLevel(MinecraftServer.java:486) ~[paper-1.21.5.jar:1.21.5-114-a1b3058]
        at net.minecraft.server.dedicated.DedicatedServer.initServer(DedicatedServer.java:280) ~[paper-1.21.5.jar:1.21.5-114-a1b3058]
        at net.minecraft.server.MinecraftServer.runServer(MinecraftServer.java:1161) ~[paper-1.21.5.jar:1.21.5-114-a1b3058]
        at net.minecraft.server.MinecraftServer.lambda$spin$2(MinecraftServer.java:308) ~[paper-1.21.5.jar:1.21.5-114-a1b3058]
        at java.base/java.lang.Thread.run(Thread.java:1583) ~[?:?]