Console error when trying to select units (1.13.2)

[Iksolqed]

Am I doing something wrong?
Currently using the 3.2.9-CB1.13.2 version (BuildTools), alongside with EssentialsX, Vault and Latest Towny Version.
Everything works fine until I try to select a unit by right clicking it, then this error appears:

[23:51:46 INFO]: Iksolqed issued server command: /fmob spawn Archer
[23:51:49 ERROR]: Could not pass event PlayerInteractEntityEvent to FactionMobs
v3.2.9_1.13.2-R0.1
org.bukkit.event.EventException: null
at org.bukkit.plugin.java.JavaPluginLoader$1.execute(JavaPluginLoader.ja
va:309) ~[spigot-1.13.2.jar:git-Spigot-518206a-a5b9c7b]
at org.bukkit.plugin.RegisteredListener.callEvent(RegisteredListener.jav
a:62) ~[spigot-1.13.2.jar:git-Spigot-518206a-a5b9c7b]
at org.bukkit.plugin.SimplePluginManager.fireEvent(SimplePluginManager.j
ava:500) ~[spigot-1.13.2.jar:git-Spigot-518206a-a5b9c7b]
at org.bukkit.plugin.SimplePluginManager.callEvent(SimplePluginManager.j
ava:485) ~[spigot-1.13.2.jar:git-Spigot-518206a-a5b9c7b]
at net.minecraft.server.v1_13_R2.PlayerConnection.a(PlayerConnection.jav
a:1814) ~[spigot-1.13.2.jar:git-Spigot-518206a-a5b9c7b]
at net.minecraft.server.v1_13_R2.PacketPlayInUseEntity.a(SourceFile:69)
~[spigot-1.13.2.jar:git-Spigot-518206a-a5b9c7b]
at net.minecraft.server.v1_13_R2.PacketPlayInUseEntity.a(SourceFile:13)
~[spigot-1.13.2.jar:git-Spigot-518206a-a5b9c7b]
at net.minecraft.server.v1_13_R2.PlayerConnectionUtils.a(SourceFile:10)
~[spigot-1.13.2.jar:git-Spigot-518206a-a5b9c7b]
at java.util.concurrent.Executors$RunnableAdapter.call(Unknown Source) [
?:1.8.0_181]
at java.util.concurrent.FutureTask.run(Unknown Source) [?:1.8.0_181]
at net.minecraft.server.v1_13_R2.SystemUtils.a(SourceFile:199) [spigot-1
.13.2.jar:git-Spigot-518206a-a5b9c7b]
at net.minecraft.server.v1_13_R2.MinecraftServer.b(MinecraftServer.java:
895) [spigot-1.13.2.jar:git-Spigot-518206a-a5b9c7b]
at net.minecraft.server.v1_13_R2.DedicatedServer.b(DedicatedServer.java:
417) [spigot-1.13.2.jar:git-Spigot-518206a-a5b9c7b]
at net.minecraft.server.v1_13_R2.MinecraftServer.a(MinecraftServer.java:
830) [spigot-1.13.2.jar:git-Spigot-518206a-a5b9c7b]
at net.minecraft.server.v1_13_R2.MinecraftServer.run(MinecraftServer.jav
a:728) [spigot-1.13.2.jar:git-Spigot-518206a-a5b9c7b]
at java.lang.Thread.run(Unknown Source) [?:1.8.0_181]
Caused by: java.lang.NoSuchMethodError: net.minecraft.server.v1_13_R2.WorldServe
r.getChunkProviderServer()Lnet/minecraft/server/v1_13_R2/ChunkProviderServer;
at com.gmail.scyntrus.fmob.Utils.optimizedTargetSearch(Utils.java:279) ~
[?:?]

]
at com.gmail.scyntrus.fmob.mobs.Archer.updateMob(Archer.java:316) ~[?:?]

    at com.gmail.scyntrus.fmob.EntityListener.onPlayerInteract(EntityListene

r.java:115) ~[?:?]
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[?:1.8.0
_181]
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source) ~[?:1.8.0
_181]
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) ~[?:1
.8.0_181]
at java.lang.reflect.Method.invoke(Unknown Source) ~[?:1.8.0_181]
at org.bukkit.plugin.java.JavaPluginLoader$1.execute(JavaPluginLoader.ja
va:305) ~[spigot-1.13.2.jar:git-Spigot-518206a-a5b9c7b]
... 15 more