Citizens 2 not working

My citizens2 plugin isn't working. when I type /npc create [name] in chat, it says this:

an internal error occurred while attempting to preform this command

------------------------------------------------

and console says this:

Code:

19.08 15:46:57 [Server] INFO NomadicalYT issued server command: /npc2
19.08 15:46:57 [Server] ERROR null
19.08 15:46:57 [Server] INFO org.bukkit.command.CommandException: Cannot execute command 'npc2' in plugin Citizens v2.0.26-SNAPSHOT (build 1997) - plugin is disabled.
19.08 15:46:57 [Server] INFO at org.bukkit.command.PluginCommand.execute(PluginCommand.java:37) ~[patched_1.16.1.jar:git-Paper-21]
19.08 15:46:57 [Server] INFO at org.bukkit.command.SimpleCommandMap.dispatch(SimpleCommandMap.java:159) ~[patched_1.16.1.jar:git-Paper-21]
19.08 15:46:57 [Server] INFO at org.bukkit.craftbukkit.v1_16_R1.CraftServer.dispatchCommand(CraftServer.java:792) ~[patched_1.16.1.jar:git-Paper-21]
19.08 15:46:57 [Server] INFO at net.minecraft.server.v1_16_R1.PlayerConnection.handleCommand(PlayerConnection.java:1908) ~[patched_1.16.1.jar:git-Paper-21]
19.08 15:46:57 [Server] INFO at net.minecraft.server.v1_16_R1.PlayerConnection.a(PlayerConnection.java:1719) ~[patched_1.16.1.jar:git-Paper-21]
19.08 15:46:57 [Server] INFO at net.minecraft.server.v1_16_R1.PacketPlayInChat.a(PacketPlayInChat.java:47) ~[patched_1.16.1.jar:git-Paper-21]
19.08 15:46:57 [Server] INFO at net.minecraft.server.v1_16_R1.PacketPlayInChat.a(PacketPlayInChat.java:5) ~[patched_1.16.1.jar:git-Paper-21]
19.08 15:46:57 [Server] INFO at net.minecraft.server.v1_16_R1.PlayerConnectionUtils.lambda$ensureMainThread$0(PlayerConnectionUtils.java:23) ~[patched_1.16.1.jar:git-Paper-21]
19.08 15:46:57 [Server] INFO at net.minecraft.server.v1_16_R1.TickTask.run(SourceFile:18) ~[patched_1.16.1.jar:git-Paper-21]
19.08 15:46:57 [Server] INFO at net.minecraft.server.v1_16_R1.IAsyncTaskHandler.executeTask(IAsyncTaskHandler.java:136) ~[patched_1.16.1.jar:git-Paper-21]
19.08 15:46:57 [Server] INFO at net.minecraft.server.v1_16_R1.IAsyncTaskHandlerReentrant.executeTask(SourceFile:23) ~[patched_1.16.1.jar:git-Paper-21]
19.08 15:46:57 [Server] INFO at net.minecraft.server.v1_16_R1.IAsyncTaskHandler.executeNext(IAsyncTaskHandler.java:109) ~[patched_1.16.1.jar:git-Paper-21]
19.08 15:46:57 [Server] INFO at net.minecraft.server.v1_16_R1.MinecraftServer.aZ(MinecraftServer.java:1136) ~[patched_1.16.1.jar:git-Paper-21]
19.08 15:46:57 [Server] INFO at net.minecraft.server.v1_16_R1.MinecraftServer.executeNext(MinecraftServer.java:1129) ~[patched_1.16.1.jar:git-Paper-21]
19.08 15:46:57 [Server] INFO at net.minecraft.server.v1_16_R1.IAsyncTaskHandler.awaitTasks(IAsyncTaskHandler.java:119) ~[patched_1.16.1.jar:git-Paper-21]
19.08 15:46:57 [Server] INFO at net.minecraft.server.v1_16_R1.MinecraftServer.sleepForTick(MinecraftServer.java:1090) ~[patched_1.16.1.jar:git-Paper-21]
19.08 15:46:57 [Server] INFO at net.minecraft.server.v1_16_R1.MinecraftServer.v(MinecraftServer.java:1004) ~[patched_1.16.1.jar:git-Paper-21]
19.08 15:46:57 [Server] INFO at net.minecraft.server.v1_16_R1.MinecraftServer.lambda$a$0(MinecraftServer.java:177) ~[patched_1.16.1.jar:git-Paper-21]
19.08 15:46:57 [Server] INFO at java.lang.Thread.run(Thread.java:748) [?:1.8.0_242]

Please help!