Hey, im using Sentinel and Citizens.
Sorry for this, but im on 1.8.9.
Basically, Sentinel spam that in console:
[15:50:07] [Server thread/WARN]: [Sentinel] Task #12 for Sentinel v2.7.2-SNAPSHOT (build 502) generated an exception
java.lang.NoSuchMethodError: net.citizensnpcs.api.npc.NPC.getOrAddTrait(Ljava/lang/Class;)Lnet/citizensnpcs/api/trait/Trait;
at org.mcmonkey.sentinel.SentinelPlugin$1.run(SentinelPlugin.java:335) ~[?:?]
at org.bukkit.craftbukkit.v1_8_R3.scheduler.CraftTask.run(CraftTask.java:59) ~[patched_1.8.8.jar:git-PaperSpigot-445]
at org.bukkit.craftbukkit.v1_8_R3.scheduler.CraftScheduler.mainThreadHeartbeat(CraftScheduler.java:352) [patched_1.8.8.jar:git-PaperSpigot-445]
at net.minecraft.server.v1_8_R3.MinecraftServer.B(MinecraftServer.java:783) [patched_1.8.8.jar:git-PaperSpigot-445]
at net.minecraft.server.v1_8_R3.DedicatedServer.B(DedicatedServer.java:378) [patched_1.8.8.jar:git-PaperSpigot-445]
at net.minecraft.server.v1_8_R3.MinecraftServer.A(MinecraftServer.java:713) [patched_1.8.8.jar:git-PaperSpigot-445]
at net.minecraft.server.v1_8_R3.MinecraftServer.run(MinecraftServer.java:616) [patched_1.8.8.jar:git-PaperSpigot-445]
at java.lang.Thread.run(Thread.java:750) [?:1.8.0_342]
And errors on Sentinel events saying that some methods like getOrAddTrait and getTraitNullable are not defined
The thing is that im using both plugin with version that should work in 1.8.9