[Rcon] Cannot invoke "com.javazilla.bukkitfabric.interfaces.IMixinServerEntityPlayer.getBukkitEntity()" because "e" is null

[LunarN0v4]

This happens when connecting a Fabric + Cardboard server via Rcon and using any command:

Jul 18 19:31:40 Arctic start.sh[1433036]: [19:31:40] [Server thread/INFO]: BROADCAST DEBUG: hi oomfs
Jul 18 19:31:40 Arctic start.sh[1433036]: [19:31:40] [Server thread/INFO]: [Rcon] hi oomfs
Jul 18 19:31:40 Arctic start.sh[1433036]: [19:31:40] [Server thread/ERROR]: Task failed
Jul 18 19:31:40 Arctic start.sh[1433036]: java.util.concurrent.CompletionException: java.lang.NullPointerException: Cannot invoke "com.javazilla.bukkitfabric.interfaces.IMixinServerEntityPlayer.getBukkitEntity()" because "e" is null
Jul 18 19:31:40 Arctic start.sh[1433036]:         at java.util.concurrent.CompletableFuture.encodeThrowable(CompletableFuture.java:315) ~[?:?]
Jul 18 19:31:40 Arctic start.sh[1433036]:         at java.util.concurrent.CompletableFuture.completeThrowable(CompletableFuture.java:320) ~[?:?]
Jul 18 19:31:40 Arctic start.sh[1433036]:         at java.util.concurrent.CompletableFuture$UniAccept.tryFire(CompletableFuture.java:722) ~[?:?]
Jul 18 19:31:40 Arctic start.sh[1433036]:         at java.util.concurrent.CompletableFuture$Completion.run(CompletableFuture.java:482) ~[?:?]
Jul 18 19:31:40 Arctic start.sh[1433036]:         at net.minecraft.class_3738.run(class_3738.java:18) ~[server-intermediary.jar:?]
Jul 18 19:31:40 Arctic start.sh[1433036]:         at net.minecraft.class_1255.method_18859(class_1255.java:156) ~[server-intermediary.jar:?]
Jul 18 19:31:40 Arctic start.sh[1433036]:         at net.minecraft.class_4093.method_18859(class_4093.java:23) ~[server-intermediary.jar:?]
Jul 18 19:31:40 Arctic start.sh[1433036]:         at net.minecraft.server.MinecraftServer.method_24306(MinecraftServer.java:782) ~[server-intermediary.jar:?]
Jul 18 19:31:40 Arctic start.sh[1433036]:         at net.minecraft.server.MinecraftServer.method_18859(MinecraftServer.java:164) ~[server-intermediary.jar:?]
Jul 18 19:31:40 Arctic start.sh[1433036]:         at net.minecraft.class_1255.method_16075(class_1255.java:130) ~[server-intermediary.jar:?]
Jul 18 19:31:40 Arctic start.sh[1433036]:         at net.minecraft.server.MinecraftServer.method_20415(MinecraftServer.java:764) ~[server-intermediary.jar:?]
Jul 18 19:31:40 Arctic start.sh[1433036]:         at net.minecraft.server.MinecraftServer.method_16075(MinecraftServer.java:758) ~[server-intermediary.jar:?]
Jul 18 19:31:40 Arctic start.sh[1433036]:         at net.minecraft.class_1255.method_18857(class_1255.java:139) ~[server-intermediary.jar:?]
Jul 18 19:31:40 Arctic start.sh[1433036]:         at net.minecraft.server.MinecraftServer.method_16208(MinecraftServer.java:743) ~[server-intermediary.jar:?]
Jul 18 19:31:40 Arctic start.sh[1433036]:         at net.minecraft.server.MinecraftServer.method_29741(MinecraftServer.java:675) ~[server-intermediary.jar:?]
Jul 18 19:31:40 Arctic start.sh[1433036]:         at net.minecraft.server.MinecraftServer.method_29739(MinecraftServer.java:265) ~[server-intermediary.jar:?]
Jul 18 19:31:40 Arctic start.sh[1433036]:         at java.lang.Thread.run(Thread.java:840) ~[?:?]
Jul 18 19:31:40 Arctic start.sh[1433036]: Caused by: java.lang.NullPointerException: Cannot invoke "com.javazilla.bukkitfabric.interfaces.IMixinServerEntityPlayer.getBukkitEntity()" because "e" is null
Jul 18 19:31:40 Arctic start.sh[1433036]:         at net.minecraft.class_3324.getPlayer_0(class_3324.java:3062) ~[server-intermediary.jar:?]
Jul 18 19:31:40 Arctic start.sh[1433036]:         at net.minecraft.class_3324.method_44791(class_3324.java:3097) ~[server-intermediary.jar:?]
Jul 18 19:31:40 Arctic start.sh[1433036]:         at net.minecraft.class_3324.method_44166(class_3324.java:819) ~[server-intermediary.jar:?]
Jul 18 19:31:40 Arctic start.sh[1433036]:         at net.minecraft.class_3110.method_43657(class_3110.java:25) ~[server-intermediary.jar:?]
Jul 18 19:31:40 Arctic start.sh[1433036]:         at net.minecraft.class_2196.method_45567(class_2196.java:69) ~[server-intermediary.jar:?]
Jul 18 19:31:40 Arctic start.sh[1433036]:         at java.util.concurrent.CompletableFuture$UniAccept.tryFire(CompletableFuture.java:718) ~[?:?]
Jul 18 19:31:40 Arctic start.sh[1433036]:         ... 14 more
Jul 18 19:32:00 Arctic start.sh[1433036]: [19:32:00] [Server thread/INFO]: [STDERR]: java.lang.NullPointerException: commandSender
Jul 18 19:32:00 Arctic start.sh[1433036]: [19:32:00] [Server thread/INFO]: [STDERR]:         at com.google.common.base.Preconditions.checkNotNull(Preconditions.java:907)
Jul 18 19:32:00 Arctic start.sh[1433036]: [19:32:00] [Server thread/INFO]: [STDERR]:         at com.destroystokyo.paper.exception.ServerCommandException.<init>(ServerCommandException.java:26)
Jul 18 19:32:00 Arctic start.sh[1433036]: [19:32:00] [Server thread/INFO]: [STDERR]:         at org.bukkit.command.SimpleCommandMap.dispatch(SimpleCommandMap.java:164)
Jul 18 19:32:00 Arctic start.sh[1433036]: [19:32:00] [Server thread/INFO]: [STDERR]:         at org.bukkit.craftbukkit.CraftServer.dispatchCommand(CraftServer.java:949)
Jul 18 19:32:00 Arctic start.sh[1433036]: [19:32:00] [Server thread/INFO]: [STDERR]:         at org.cardboardpowered.impl.command.BukkitCommandWrapper.run(BukkitCommandWrapper.java:61)
Jul 18 19:32:00 Arctic start.sh[1433036]: [19:32:00] [Server thread/INFO]: [STDERR]:         at com.mojang.brigadier.CommandDispatcher.execute(CommandDispatcher.java:264)
Jul 18 19:32:00 Arctic start.sh[1433036]: [19:32:00] [Server thread/INFO]: [STDERR]:         at net.minecraft.class_2170.redirect$zgf000$architectury$performCommand(class_2170.java:545)
Jul 18 19:32:00 Arctic start.sh[1433036]: [19:32:00] [Server thread/INFO]: [STDERR]:         at net.minecraft.class_2170.method_9249(class_2170.java:287)
Jul 18 19:32:00 Arctic start.sh[1433036]: [19:32:00] [Server thread/INFO]: [STDERR]:         at net.minecraft.class_2170.method_44252(class_2170.java:280)
Jul 18 19:32:00 Arctic start.sh[1433036]: [19:32:00] [Server thread/INFO]: [STDERR]:         at net.minecraft.class_3176.method_20799(class_3176.java:527)
Jul 18 19:32:00 Arctic start.sh[1433036]: [19:32:00] [Server thread/INFO]: [STDERR]:         at net.minecraft.class_1255.method_5386(class_1255.java:67)
Jul 18 19:32:00 Arctic start.sh[1433036]: [19:32:00] [Server thread/INFO]: [STDERR]:         at java.base/java.util.concurrent.CompletableFuture$AsyncSupply.run(CompletableFuture.java:1768)Jul 18 19:32:00 Arctic start.sh[1433036]: [19:32:00] [Server thread/INFO]: [STDERR]:         at net.minecraft.class_3738.run(class_3738.java:18)
Jul 18 19:32:00 Arctic start.sh[1433036]: [19:32:00] [Server thread/INFO]: [STDERR]:         at net.minecraft.class_1255.method_18859(class_1255.java:156)
Jul 18 19:32:00 Arctic start.sh[1433036]: [19:32:00] [Server thread/INFO]: [STDERR]:         at net.minecraft.class_4093.method_18859(class_4093.java:23)
Jul 18 19:32:00 Arctic start.sh[1433036]: [19:32:00] [Server thread/INFO]: [STDERR]:         at net.minecraft.server.MinecraftServer.method_24306(MinecraftServer.java:782)
Jul 18 19:32:00 Arctic start.sh[1433036]: [19:32:00] [Server thread/INFO]: [STDERR]:         at net.minecraft.server.MinecraftServer.method_18859(MinecraftServer.java:164)
Jul 18 19:32:00 Arctic start.sh[1433036]: [19:32:00] [Server thread/INFO]: [STDERR]:         at net.minecraft.class_1255.method_16075(class_1255.java:130)
Jul 18 19:32:00 Arctic start.sh[1433036]: [19:32:00] [Server thread/INFO]: [STDERR]:         at net.minecraft.server.MinecraftServer.method_20415(MinecraftServer.java:764)
Jul 18 19:32:00 Arctic start.sh[1433036]: [19:32:00] [Server thread/INFO]: [STDERR]:         at net.minecraft.server.MinecraftServer.method_16075(MinecraftServer.java:758)
Jul 18 19:32:00 Arctic start.sh[1433036]: [19:32:00] [Server thread/INFO]: [STDERR]:         at net.minecraft.class_1255.method_18857(class_1255.java:139)
Jul 18 19:32:00 Arctic start.sh[1433036]: [19:32:00] [Server thread/INFO]: [STDERR]:         at net.minecraft.server.MinecraftServer.method_16208(MinecraftServer.java:743)
Jul 18 19:32:00 Arctic start.sh[1433036]: [19:32:00] [Server thread/INFO]: [STDERR]:         at net.minecraft.server.MinecraftServer.method_29741(MinecraftServer.java:675)
Jul 18 19:32:00 Arctic start.sh[1433036]: [19:32:00] [Server thread/INFO]: [STDERR]:         at net.minecraft.server.MinecraftServer.method_29739(MinecraftServer.java:265)
Jul 18 19:32:00 Arctic start.sh[1433036]: [19:32:00] [Server thread/INFO]: [STDERR]:         at java.base/java.lang.Thread.run(Thread.java:840)