EFA Saving

[09:54:57] [Server thread/WARN]: [EpicFarming] Task #20 for EpicFarming v2.2.4 generated an exception
java.lang.NullPointerException: null
        at com.songoda.epicfarming.storage.types.StorageYaml.copyFile(StorageYaml.java:143) ~[?:?]
        at com.songoda.epicfarming.storage.types.StorageYaml.makeBackup(StorageYaml.java:111) ~[?:?]
        at com.songoda.epicfarming.storage.types.StorageYaml.doSave(StorageYaml.java:73) ~[?:?]
        at com.songoda.epicfarming.EpicFarming.saveToFile(EpicFarming.java:212) ~[?:?]
        at org.bukkit.craftbukkit.v1_14_R1.scheduler.CraftTask.run(CraftTask.java:81) ~[spigot-1.14.4.jar:git-Spigot-94af569-a3fdef8]
        at org.bukkit.craftbukkit.v1_14_R1.scheduler.CraftScheduler.mainThreadHeartbeat(CraftScheduler.java:394) [spigot-1.14.4.jar:git-Spigot-94af569-a3fdef8]
        at net.minecraft.server.v1_14_R1.MinecraftServer.b(MinecraftServer.java:1022) [spigot-1.14.4.jar:git-Spigot-94af569-a3fdef8]
        at net.minecraft.server.v1_14_R1.DedicatedServer.b(DedicatedServer.java:393) [spigot-1.14.4.jar:git-Spigot-94af569-a3fdef8]
        at net.minecraft.server.v1_14_R1.MinecraftServer.a(MinecraftServer.java:970) [spigot-1.14.4.jar:git-Spigot-94af569-a3fdef8]
        at net.minecraft.server.v1_14_R1.MinecraftServer.run(MinecraftServer.java:815) [spigot-1.14.4.jar:git-Spigot-94af569-a3fdef8]
        at java.lang.Thread.run(Unknown Source) [?:1.8.0_221]