The error is primarily caused by connectivity glitches on either Minecraft’s servers or an unstable internet connection. A stable and continuous network connection is essential for Minecraft to handle data flow properly, so interruptions on either end can trigger this error.

1. Power Cycle the Internet Router

Before trying anything complicated, restarting your router can often fix this issue. Power cycling clears temporary network errors or IP problems that might be blocking Minecraft’s connection. Just turn off the router, wait a few moments, then turn it back on to refresh your internet connection and get stable access to the server again.

2. Restart Launcher

Restarting your game launcher can fix minor connection problems. By relaunching Minecraft, it refreshes the link to the server, resolving temporary login or session issues. This simple step can help the server recognize your account correctly.

3. Use Direct Connect

Sometimes, using Direct Connect instead of the server list can help connect to the server more easily. By entering the server IP directly, you might avoid temporary authentication problems associated with the normal connection method. This approach often bypasses connection issues and provides a straightforward link to the server, offering a quick solution for authentication errors.

4. Log Out and Log Back into the Minecraft Launcher

Sometimes, simply refreshing your login can fix the connection to Minecraft’s servers. Logging out and back into the Minecraft launcher removes old or broken data. This step helps the game check your account again and make a new, stable connection.

5. Rejoin the Hypixel Server

Sometimes, leaving and rejoining the Hypixel server can reset your connection and fix temporary access issues.

6. Edit the Hosts File

Adjusting the Hosts file can improve connectivity by linking IP addresses directly. This helps Minecraft connect more easily to its servers. By making this change, you can avoid network issues, ensuring the game connects properly without problems.

7. Allow Minecraft Traffic in the System’s Firewall

Allowing Minecraft through your firewall lets the game’s data move freely between your device and the server, preventing connection blocks and ensuring smooth authentication. Warning: Proceed at your own risk as editing the firewall settings is a proficient task, and if done incorrectly, you may expose your system/data to threats. If the issue persists, check if allowing the port 25565 in the Firewall settings (Action» New Rule» Port) resolves the issue. If that did not do the trick, ensure the router’s (or corporate) Firewall is not blocking access to port 25565.

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