This is genuinely making me mad

Every time someone that isn't me joins my server, there is an error that pops up in Console, this happens when they join, when I try to op them or they run /opme, or even adding and removing from saconfig

The error is:

[22:21:53] [Server thread/INFO]: [TotalFreedomMod] Creating new player data entry for Tman31803[22:21:53] [Server thread/ERROR]: Could not pass event PlayerJoinEvent to TotalFreedomMod v2022.06java.lang.NullPointerException: Cannot invoke "java.util.List.contains(Object)" because the return value of "me.totalfreedom.totalfreedommod.config.ConfigEntry.getList()" is null at me.totalfreedom.totalfreedommod.rank.RankManager.getDisplay(RankManager.java:46) ~[TotalFreedomMod.jar:?] at me.totalfreedom.totalfreedommod.rank.RankManager.updateDisplay(RankManager.java:141) ~[TotalFreedomMod.jar:?] at me.totalfreedom.totalfreedommod.rank.RankManager.onPlayerJoin(RankManager.java:187) ~[TotalFreedomMod.jar:?] at com.destroystokyo.paper.event.executor.asm.generated.GeneratedEventExecutor215.execute(Unknown Source) ~[?:?] at org.bukkit.plugin.EventExecutor.lambda$create$1(EventExecutor.java:69) ~[patched_1.17.1.jar:git-Paper-411] at co.aikar.timings.TimedEventExecutor.execute(TimedEventExecutor.java:80) ~[patched_1.17.1.jar:git-Paper-411] at org.bukkit.plugin.RegisteredListener.callEvent(RegisteredListener.java:70) ~[patched_1.17.1.jar:git-Paper-411] at org.bukkit.plugin.SimplePluginManager.callEvent(SimplePluginManager.java:628) ~[patched_1.17.1.jar:git-Paper-411] at net.minecraft.server.players.PlayerList.postChunkLoadJoin(PlayerList.java:360) ~[patched_1.17.1.jar:git-Paper-411] at net.minecraft.server.players.PlayerList.lambda$placeNewPlayer$1(PlayerList.java:302) ~[patched_1.17.1.jar:git-Paper-411] at net.minecraft.server.network.ServerGamePacketListenerImpl.tick(ServerGamePacketListenerImpl.java:307) ~[app:?] at net.minecraft.network.Connection.tick(Connection.java:555) ~[app:?] at net.minecraft.server.network.ServerConnectionListener.tick(ServerConnectionListener.java:201) ~[app:?] at net.minecraft.server.MinecraftServer.tickChildren(MinecraftServer.java:1656) ~[patched_1.17.1.jar:git-Paper-411] at net.minecraft.server.dedicated.DedicatedServer.tickChildren(DedicatedServer.java:490) ~[patched_1.17.1.jar:git-Paper-411] at net.minecraft.server.MinecraftServer.tickServer(MinecraftServer.java:1483) ~[patched_1.17.1.jar:git-Paper-411] at net.minecraft.server.MinecraftServer.runServer(MinecraftServer.java:1282) ~[patched_1.17.1.jar:git-Paper-411] at net.minecraft.server.MinecraftServer.lambda$spin$0(MinecraftServer.java:319) ~[patched_1.17.1.jar:git-Paper-411] at java.lang.Thread.run(Thread.java:833) ~[?:?]

This actually makes me mad and I don't know what it is. It doesn't matter if the accounts are premium or cracked, it's just going to throw this error and I don't know how to fix it.

Quote from videogamesm12

Does the "Server Owners" section in your TotalFreedomMod configuration exist?

Yes, both for Discord and the title itself.

The only thing I've added in the ConfigEntry class is a spot for the co-owner.

If you're talking about the config.yml file, yes.

After looking back into RankManager.java, I see that I had put an "else if" instead of just "if" for implementing the Co-Owner title into my TFM config.

This thread can be closed now, everything works fine now. Idk what it was but after Video said "configuration" I went straight to everything that I knew had "Server Owner" in it and found the issue.
'Preciate it boss.