43:54] [Server thread/INFO]: [Werewolf] Enabling Werewolf v1.4.8
[05:43:54] [Server thread/ERROR]: Error occurred while enabling Werewolf v1.4.8 (Is it up to date?)
java.lang.NullPointerException: null
    at skinsrestorer.shared.storage.SkinStorage.getPlayerSkin(SkinStorage.java:182) ~[?:?]
    at skinsrestorer.shared.storage.SkinStorage.getOrCreateSkinForPlayer(SkinStorage.java:119) ~[?:?]
    at skinsrestorer.shared.storage.SkinStorage.getOrCreateSkinForPlayer(SkinStorage.java:151) ~[?:?]
    at us.rfsmassacre.Werewolf.Managers.SkinManager.<init>(SkinManager.java:39) ~[?:?]
    at us.rfsmassacre.Werewolf.Listeners.SkinListener.<init>(SkinListener.java:28) ~[?:?]
    at us.rfsmassacre.Werewolf.WerewolfPlugin.onEnable(WerewolfPlugin.java:74) ~[?:?]
    at org.bukkit.plugin.java.JavaPlugin.setEnabled(JavaPlugin.java:263) ~[spigot-1.15.2.jar:git-Spigot-2f5d615-8637ec0]
    at org.bukkit.plugin.java.JavaPluginLoader.enablePlugin(JavaPluginLoader.java:351) [spigot-1.15.2.jar:git-Spigot-2f5d615-8637ec0]
    at org.bukkit.plugin.SimplePluginManager.enablePlugin(SimplePluginManager.java:480) [spigot-1.15.2.jar:git-Spigot-2f5d615-8637ec0]
    at org.bukkit.craftbukkit.v1_15_R1.CraftServer.enablePlugin(CraftServer.java:464) [spigot-1.15.2.jar:git-Spigot-2f5d615-8637ec0]
    at org.bukkit.craftbukkit.v1_15_R1.CraftServer.enablePlugins(CraftServer.java:378) [spigot-1.15.2.jar:git-Spigot-2f5d615-8637ec0]
    at net.minecraft.server.v1_15_R1.MinecraftServer.a(MinecraftServer.java:457) [spigot-1.15.2.jar:git-Spigot-2f5d615-8637ec0]
    at net.minecraft.server.v1_15_R1.DedicatedServer.init(DedicatedServer.java:274) [spigot-1.15.2.jar:git-Spigot-2f5d615-8637ec0]
    at net.minecraft.server.v1_15_R1.MinecraftServer.run(MinecraftServer.java:784) [spigot-1.15.2.jar:git-Spigot-2f5d615-8637ec0]
    at java.lang.Thread.run(Thread.java:834) [?:?]