Bukkit

[17:16:46] [Server thread/ERROR]: Error occurred while enabling PlayerBags v0.1 (Is it up to date?)
java.lang.NullPointerException: null
at me.greenadine.playerbags.util.PlayerFiles.loadBag(PlayerFiles.java:91) ~[?:?]
at me.greenadine.playerbags.Saver.load(Saver.java:40) ~[?:?]
at me.greenadine.playerbags.Main.onEnable(Main.java:104) ~[?:?]
at org.bukkit.plugin.java.JavaPlugin.setEnabled(JavaPlugin.java:265) ~[patched_1.13.2.jar:git-Paper-625]
at org.bukkit.plugin.java.JavaPluginLoader.enablePlugin(JavaPluginLoader.java:334) ~[patched_1.13.2.jar:git-Paper-625]
at org.bukkit.plugin.SimplePluginManager.enablePlugin(SimplePluginManager.java:412) ~[patched_1.13.2.jar:git-Paper-625]
at org.bukkit.craftbukkit.v1_13_R2.CraftServer.enablePlugin(CraftServer.java:443) ~[patched_1.13.2.jar:git-Paper-625]
at org.bukkit.craftbukkit.v1_13_R2.CraftServer.enablePlugins(CraftServer.java:357) ~[patched_1.13.2.jar:git-Paper-625]
at net.minecraft.server.v1_13_R2.DedicatedServer.init(DedicatedServer.java:236) ~[patched_1.13.2.jar:git-Paper-625]
at net.minecraft.server.v1_13_R2.MinecraftServer.run(MinecraftServer.java:787) ~[patched_1.13.2.jar:git-Paper-625]
at java.lang.Thread.run(Thread.java:748) [?:1.8.0_212]

i used v0.1.1