java.lang.IllegalStateException: no implementation set
        at net.citizensnpcs.api.CitizensAPI.getImplementation(CitizensAPI.java:65) ~[?:?]
        at net.citizensnpcs.api.CitizensAPI.getNPCRegistry(CitizensAPI.java:96) ~[?:?]
        at deathspirit.millionhearts.heart.RichHeart.onInteract(RichHeart.java:60) ~[?:?]
        at com.destroystokyo.paper.event.executor.asm.generated.GeneratedEventExecutor165.execute(Unknown Source) ~[?:?]
        at org.bukkit.plugin.EventExecutor.lambda$create$1(EventExecutor.java:69) ~[patched_1.16.5.jar:git-Paper-790]
        at org.bukkit.plugin.EventExecutor$$Lambda$3696/338205670.execute(Unknown Source) ~[?:?]
        at co.aikar.timings.TimedEventExecutor.execute(TimedEventExecutor.java:80) ~[patched_1.16.5.jar:git-Paper-790]
        at org.bukkit.plugin.RegisteredListener.callEvent(RegisteredListener.java:70) ~[patched_1.16.5.jar:git-Paper-790]
        at org.bukkit.plugin.SimplePluginManager.callEvent(SimplePluginManager.java:624) ~[patched_1.16.5.jar:git-Paper-790]
        at org.bukkit.craftbukkit.v1_16_R3.event.CraftEventFactory.callPlayerInteractEvent(CraftEventFactory.java:549) ~[patched_1.16.5.jar:git-Paper-790]
        at org.bukkit.craftbukkit.v1_16_R3.event.CraftEventFactory.callPlayerInteractEvent(CraftEventFactory.java:512) ~[patched_1.16.5.jar:git-Paper-790]
        at org.bukkit.craftbukkit.v1_16_R3.event.CraftEventFactory.callPlayerInteractEvent(CraftEventFactory.java:507) ~[patched_1.16.5.jar:git-Paper-790]
        at org.bukkit.craftbukkit.v1_16_R3.event.CraftEventFactory.callPlayerInteractEvent(CraftEventFactory.java:503) ~[patched_1.16.5.jar:git-Paper-790]
        at net.minecraft.server.v1_16_R3.PlayerConnection.a(PlayerConnection.java:1766) ~[patched_1.16.5.jar:git-Paper-790]
        at net.minecraft.server.v1_16_R3.PacketPlayInBlockPlace.a(PacketPlayInBlockPlace.java:32) ~[patched_1.16.5.jar:git-Paper-790]
        at net.minecraft.server.v1_16_R3.PacketPlayInBlockPlace.a(PacketPlayInBlockPlace.java:9) ~[patched_1.16.5.jar:git-Paper-790]
        at net.minecraft.server.v1_16_R3.PlayerConnectionUtils.lambda$ensureMainThread$1(PlayerConnectionUtils.java:35) ~[patched_1.16.5.jar:git-Paper-790]
        at net.minecraft.server.v1_16_R3.PlayerConnectionUtils$$Lambda$5016/1436619306.run(Unknown Source) ~[?:?]
        at net.minecraft.server.v1_16_R3.TickTask.run(SourceFile:18) ~[patched_1.16.5.jar:git-Paper-790]
        at net.minecraft.server.v1_16_R3.IAsyncTaskHandler.executeTask(IAsyncTaskHandler.java:136) ~[patched_1.16.5.jar:git-Paper-790]
        at net.minecraft.server.v1_16_R3.IAsyncTaskHandlerReentrant.executeTask(SourceFile:23) ~[patched_1.16.5.jar:git-Paper-790]
        at net.minecraft.server.v1_16_R3.IAsyncTaskHandler.executeNext(IAsyncTaskHandler.java:109) ~[patched_1.16.5.jar:git-Paper-790]
        at net.minecraft.server.v1_16_R3.MinecraftServer.bb(MinecraftServer.java:1271) ~[patched_1.16.5.jar:git-Paper-790]
        at net.minecraft.server.v1_16_R3.MinecraftServer.executeNext(MinecraftServer.java:1264) ~[patched_1.16.5.jar:git-Paper-790]
        at net.minecraft.server.v1_16_R3.IAsyncTaskHandler.awaitTasks(IAsyncTaskHandler.java:119) ~[patched_1.16.5.jar:git-Paper-790]
        at net.minecraft.server.v1_16_R3.MinecraftServer.sleepForTick(MinecraftServer.java:1225) ~[patched_1.16.5.jar:git-Paper-790]
        at net.minecraft.server.v1_16_R3.MinecraftServer.w(MinecraftServer.java:1139) ~[patched_1.16.5.jar:git-Paper-790]
        at net.minecraft.server.v1_16_R3.MinecraftServer.lambda$a$0(MinecraftServer.java:291) ~[patched_1.16.5.jar:git-Paper-790]
        at net.minecraft.server.v1_16_R3.MinecraftServer$$Lambda$3058/496515861.run(Unknown Source) ~[?:?]
        at java.lang.Thread.run(Unknown Source) [?:1.8.0_51]