How to Fix "Failed to Verify Username" Error on Your Minecraft Server

The "Failed to verify username" error occurs when your Minecraft server cannot authenticate a player's account with Mojang's authentication servers. This guide shows you how to troubleshoot and fix this issue using the Wabbanode Control Panel.

This error typically appears when:

• The server is in Online Mode but cannot reach Mojang's authentication servers
• Players are using cracked/unofficial Minecraft clients
• There are temporary issues with Mojang's authentication system
• The server's online-mode setting conflicts with network configuration

Important: Disabling online mode removes account verification, which can pose security risks. Only disable it if you understand the implications.

Solution 1: Wait for Mojang Services To Resolve Their Issue

Sometimes this error is caused by temporary issues with Mojang's authentication servers:

1. Check Mojang Status to see if authentication services are experiencing issues
2. If services are down, wait for Mojang to resolve the issue
3. Ask affected players to restart their Minecraft client and try again

If Mojang's services are operational, proceed to the next solution.

Solution 2: Disable Online Mode

If you need to allow players to join without Mojang authentication (for example, for LAN servers or playing with cracked clients):

1. Navigate to the Wabbanode Control Panel and select your Minecraft server.
2. Stop your server if it is currently running. You cannot modify server settings while the server is online.
3. Click Settings to access your server properties.
4. Locate the Online-mode setting and set it to false.
5. Click Save Config at the top of the page to apply your changes.
6. Start your server.

Troubleshooting

• Error persists with online mode disabled. Ensure you clicked Save Config and restarted your server. Check the console for other error messages that might indicate a different issue.
• Players still can't connect. Verify that the server is fully started and accessible. Check if players can ping your server IP and that the port is open.
• Skins not showing in offline mode. This is expected behavior. Skins are tied to Mojang authentication. Consider using plugins like SkinsRestorer to restore skin functionality in offline mode.
• Want to switch back to online mode. Set Online-mode to true, save, and restart. Players will need legitimate Minecraft accounts to join.