Here's the error that it gave me:
[00:10:33 ERROR]: null org.bukkit.command.CommandException: Cannot execute command 'hb' in plugin Herobrine v2.3.0 - plugin is disabled. at org.bukkit.command.PluginCommand.execute(PluginCommand.java:37) ~[paper-api-1.18.2-R0.1-SNAPSHOT.jar:?] at org.bukkit.command.SimpleCommandMap.dispatch(SimpleCommandMap.java:159) ~[paper-api-1.18.2-R0.1-SNAPSHOT.jar:?] at org.bukkit.craftbukkit.v1_18_R2.CraftServer.dispatchCommand(CraftServer.java:906) ~[paper-1.18.2.jar:git-Paper-341] at net.minecraft.server.network.ServerGamePacketListenerImpl.handleCommand(ServerGamePacketListenerImpl.java:2306) ~[?:?] at net.minecraft.server.network.ServerGamePacketListenerImpl.handleChat(ServerGamePacketListenerImpl.java:2117) ~[?:?] at net.minecraft.server.network.ServerGamePacketListenerImpl.handleChat(ServerGamePacketListenerImpl.java:2098) ~[?:?] at net.minecraft.network.protocol.game.ServerboundChatPacket.handle(ServerboundChatPacket.java:46) ~[?:?] at net.minecraft.network.protocol.game.ServerboundChatPacket.a(ServerboundChatPacket.java:6) ~[?:?] at net.minecraft.network.protocol.PacketUtils.lambda$ensureRunningOnSameThread$1(PacketUtils.java:51) ~[?:?] at net.minecraft.server.TickTask.run(TickTask.java:18) ~[paper-1.18.2.jar:git-Paper-341] at net.minecraft.util.thread.BlockableEventLoop.doRunTask(BlockableEventLoop.java:153) ~[?:?] at net.minecraft.util.thread.ReentrantBlockableEventLoop.doRunTask(ReentrantBlockableEventLoop.java:24) ~[?:?] at net.minecraft.server.MinecraftServer.doRunTask(MinecraftServer.java:1399) ~[paper-1.18.2.jar:git-Paper-341] at net.minecraft.server.MinecraftServer.d(MinecraftServer.java:188) ~[paper-1.18.2.jar:git-Paper-341] at net.minecraft.util.thread.BlockableEventLoop.pollTask(BlockableEventLoop.java:126) ~[?:?] at net.minecraft.server.MinecraftServer.pollTaskInternal(MinecraftServer.java:1376) ~[paper-1.18.2.jar:git-Paper-341] at net.minecraft.server.MinecraftServer.pollTask(MinecraftServer.java:1369) ~[paper-1.18.2.jar:git-Paper-341] at net.minecraft.util.thread.BlockableEventLoop.managedBlock(BlockableEventLoop.java:136) ~[?:?] at net.minecraft.server.MinecraftServer.waitUntilNextTick(MinecraftServer.java:1347) ~[paper-1.18.2.jar:git-Paper-341] at net.minecraft.server.MinecraftServer.runServer(MinecraftServer.java:1229) ~[paper-1.18.2.jar:git-Paper-341] at net.minecraft.server.MinecraftServer.lambda$spin$0(MinecraftServer.java:315) ~[paper-1.18.2.jar:git-Paper-341] at java.lang.Thread.run(Thread.java:833) ~[?:?]