The “Network Protocol Error” in Minecraft, especially when using Aternos (a popular free Minecraft server hosting platform), can be caused by a few different things.
Here are some potential solutions you can try:
Potential Solutions
1. Check Version Mismatch
One of the most common reasons for a protocol error is that the version of Minecraft you’re using on your client doesn’t match the version your Aternos server is running.
Solution: Make sure the Minecraft version on your client and the Aternos server are the same. You can change the Minecraft version on Aternos in the server settings.
Go to the Aternos dashboard.
Click on “Software” and select the Minecraft version you want.
Restart your server after changing the version.
2. Mod/Plugin Compatibility
If you’re using mods or plugins, they can sometimes cause version mismatches, especially if the server is running a different version of Minecraft or a modded version.
Solution: Ensure that both the server and the client have the same mods or plugins installed, and make sure they’re compatible with your Minecraft version.
3. Server Settings (Protocol Support)
Sometimes, the server may not support certain features or may have restrictions based on the protocol version.
Solution: In the Aternos server settings, make sure the server is set to the correct protocol version that matches your Minecraft client.
Also Read : Network Protocol Error Minecraft Singleplayer Fix
4. Clear Minecraft Cache
Occasionally, a corrupted cache in Minecraft can cause issues with the network protocol.
Solution: Clear the cache and restart Minecraft.
Go to your Minecraft installation folder and delete the .minecraft folder (or just the cache files).
Restart your Minecraft client.
5. Check Server Status
There could be a temporary issue on Aternos’ end causing a problem with the connection.
Solution: Check Aternos’ server status page or forums to see if they are experiencing any issues.
6. Restart Both Server and Client
A simple restart of both the Minecraft client and the Aternos server can sometimes fix minor issues.
Solution: Restart both Minecraft and the server on Aternos and try reconnecting.
7. Check for Internet Connection Issues
If your internet connection is unstable or slow, this could result in protocol errors.
Solution: Make sure your internet connection is stable, and try again.
8. Firewall or Anti-Virus
Sometimes, firewalls or antivirus software may block certain ports needed for Minecraft to connect properly.
Solution: Temporarily disable your firewall or antivirus and check if that resolves the issue.
9. Update Minecraft and Java
Ensure that both your Minecraft client and the Java version (if you’re using Java Edition) are up-to-date.
Solution: Update your Minecraft client and, if applicable, your Java version to the latest available version.
If None of the Above Works:
If you’ve tried all of these and the issue persists, you can contact Aternos support or visit their community forums for more specific advice.
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