feat(docs): known bugs

README.md

@@ -10,6 +10,15 @@ Coming soon! ⏳
 
 ---
 
+## Known bugs:
+
+- Players who have operator (OP) status lose access to the Operator Items tab in creative mode
+  after disguising **(1.20 and up)**.
+- When disguising and only changing their display name, players will have the new default
+  skins **(1.20 and up)**.
+
+---
+
 ## Q/A
 
 Q: Players are getting kicked when they send a message on versions above 1.19.2!

src/main/java/xyz/atnrch/nicko/NickoBukkit.java

@@ -1,5 +1,6 @@
 package xyz.atnrch.nicko;
 
+import com.comphenix.protocol.utility.MinecraftVersion;
 import org.bukkit.Bukkit;
 import org.bukkit.Material;
 import org.bukkit.command.PluginCommand;
@@ -49,6 +50,11 @@ public class NickoBukkit extends JavaPlugin {
     @Override
     public void onEnable() {
         plugin = this;
+
+        if (!MinecraftVersion.VILLAGE_UPDATE.atOrAbove()) {
+            getLogger().severe("This version (" + MinecraftVersion.getCurrentVersion().getVersion() + ") is not supported by Nicko!");
+        }
+
         configurationManager = new ConfigurationManager(getDataFolder());
         configurationManager.saveDefaultConfig();