[22:46:28 WARN]: [MainNpc] Task #11211954 for MainNpc v0.1 generated an exception
java.lang.IllegalArgumentException: Cannot set to an empty path
        at org.apache.commons.lang.Validate.notEmpty(Validate.java:321) ~[patched_1.12.2.jar:git-Paper-1611]
        at org.bukkit.configuration.MemorySection.set(MemorySection.java:168) ~[patched_1.12.2.jar:git-Paper-1611]
        at org.bukkit.configuration.MemorySection.set(MemorySection.java:202) ~[patched_1.12.2.jar:git-Paper-1611]
        at net.mrtrojan.mainnpc.Main.unban(Main.java:127) ~[?:?]
        at net.mrtrojan.mainnpc.Main$1.run(Main.java:117) ~[?:?]
        at org.bukkit.craftbukkit.v1_12_R1.scheduler.CraftTask.run(CraftTask.java:64) ~[patched_1.12.2.jar:git-Paper-1611]
        at org.bukkit.craftbukkit.v1_12_R1.scheduler.CraftScheduler.mainThreadHeartbeat(CraftScheduler.java:423) ~[patched_1.12.2.jar:git-Paper-1611]
        at net.minecraft.server.v1_12_R1.MinecraftServer.D(MinecraftServer.java:840) ~[patched_1.12.2.jar:git-Paper-1611]
        at net.minecraft.server.v1_12_R1.DedicatedServer.D(DedicatedServer.java:423) ~[patched_1.12.2.jar:git-Paper-1611]
        at net.minecraft.server.v1_12_R1.MinecraftServer.C(MinecraftServer.java:774) ~[patched_1.12.2.jar:git-Paper-1611]
        at net.minecraft.server.v1_12_R1.MinecraftServer.run(MinecraftServer.java:666) ~[patched_1.12.2.jar:git-Paper-1611]
        at java.lang.Thread.run(Thread.java:748) [?:1.8.0_201]