[09:40:21 ERROR]: Fatal error trying to convert HydrexStats v0.0.1-SNAPSHOT:us/hydrexpvp/hydrexstats/objects/leaderboards/Leaderboard.class
org.bukkit.plugin.AuthorNagException: No legacy enum constant for GRAY_STAINED_GLASS. Did you forget to define api-version: 1.13 in your plugin.yml?
        at org.bukkit.craftbukkit.v1_13_R2.util.Commodore$1$1.visitFieldInsn(Commodore.java:154) ~[spigot-1.13.2.jar:git-Spigot-1a3504a-84f3da3]
        at org.objectweb.asm.ClassReader.readCode(ClassReader.java:2210) ~[spigot-1.13.2.jar:git-Spigot-1a3504a-84f3da3]
        at org.objectweb.asm.ClassReader.readMethod(ClassReader.java:1283) ~[spigot-1.13.2.jar:git-Spigot-1a3504a-84f3da3]
        at org.objectweb.asm.ClassReader.accept(ClassReader.java:688) ~[spigot-1.13.2.jar:git-Spigot-1a3504a-84f3da3]
        at org.objectweb.asm.ClassReader.accept(ClassReader.java:400) ~[spigot-1.13.2.jar:git-Spigot-1a3504a-84f3da3]
        at org.bukkit.craftbukkit.v1_13_R2.util.Commodore.convert(Commodore.java:130) ~[spigot-1.13.2.jar:git-Spigot-1a3504a-84f3da3]
        at org.bukkit.craftbukkit.v1_13_R2.util.CraftMagicNumbers.processClass(CraftMagicNumbers.java:238) [spigot-1.13.2.jar:git-Spigot-1a3504a-84f3da3]
        at org.bukkit.plugin.java.PluginClassLoader.findClass(PluginClassLoader.java:109) [spigot-1.13.2.jar:git-Spigot-1a3504a-84f3da3]
        at org.bukkit.plugin.java.JavaPluginLoader.getClassByName(JavaPluginLoader.java:200) [spigot-1.13.2.jar:git-Spigot-1a3504a-84f3da3]
        at org.bukkit.plugin.java.PluginClassLoader.findClass(PluginClassLoader.java:93) [spigot-1.13.2.jar:git-Spigot-1a3504a-84f3da3]
        at org.bukkit.plugin.java.PluginClassLoader.findClass(PluginClassLoader.java:82) [spigot-1.13.2.jar:git-Spigot-1a3504a-84f3da3]
        at java.lang.ClassLoader.loadClass(Unknown Source) [?:1.8.0_191]
        at java.lang.ClassLoader.loadClass(Unknown Source) [?:1.8.0_191]
        at us.hydrexpvp.hydrexstats.HydrexStats.populateLeaderboards(HydrexStats.java:64) [HydrexStats-1.0-SNAPSHOT.jar:?]
        at us.hydrexpvp.hydrexstats.HydrexStats.onEnable(HydrexStats.java:59) [HydrexStats-1.0-SNAPSHOT.jar:?]
        at org.bukkit.plugin.java.JavaPlugin.setEnabled(JavaPlugin.java:265) [spigot-1.13.2.jar:git-Spigot-1a3504a-84f3da3]
        at org.bukkit.plugin.java.JavaPluginLoader.enablePlugin(JavaPluginLoader.java:347) [spigot-1.13.2.jar:git-Spigot-1a3504a-84f3da3]
        at org.bukkit.plugin.SimplePluginManager.enablePlugin(SimplePluginManager.java:410) [spigot-1.13.2.jar:git-Spigot-1a3504a-84f3da3]
        at org.bukkit.craftbukkit.v1_13_R2.CraftServer.enablePlugin(CraftServer.java:436) [spigot-1.13.2.jar:git-Spigot-1a3504a-84f3da3]
        at org.bukkit.craftbukkit.v1_13_R2.CraftServer.enablePlugins(CraftServer.java:350) [spigot-1.13.2.jar:git-Spigot-1a3504a-84f3da3]
        at net.minecraft.server.v1_13_R2.MinecraftServer.l(MinecraftServer.java:580) [spigot-1.13.2.jar:git-Spigot-1a3504a-84f3da3]
        at net.minecraft.server.v1_13_R2.MinecraftServer.a(MinecraftServer.java:542) [spigot-1.13.2.jar:git-Spigot-1a3504a-84f3da3]
        at net.minecraft.server.v1_13_R2.MinecraftServer.a(MinecraftServer.java:420) [spigot-1.13.2.jar:git-Spigot-1a3504a-84f3da3]
        at net.minecraft.server.v1_13_R2.DedicatedServer.init(DedicatedServer.java:294) [spigot-1.13.2.jar:git-Spigot-1a3504a-84f3da3]
        at net.minecraft.server.v1_13_R2.MinecraftServer.run(MinecraftServer.java:698) [spigot-1.13.2.jar:git-Spigot-1a3504a-84f3da3]
        at java.lang.Thread.run(Unknown Source) [?:1.8.0_191]