Fix: Failed to Verify Username
Resolve authentication errors when connecting to your Minecraft server.
The "Failed to verify username" error means the server couldn't authenticate the player with Mojang's session servers.
Common Causes and Fixes
Mojang Session Servers Down
Mojang's authentication servers may be temporarily down. Check status.mojang.com and wait for them to recover.
Online Mode Misconfiguration
If using a BungeeCord/Velocity proxy, backend servers must have online-mode=false in server.properties (the proxy handles authentication).
Without a proxy, online-mode should be true.
Proxy IP Forwarding Issues
If using BungeeCord or Velocity, ensure IP forwarding is properly configured. See IP Forwarding Guide.
Client-Side Fixes
If only one player gets this error:
- Restart their Minecraft client
- Log out and back into their Minecraft account
- Check their internet connection
💡 Tip: If the error happens to everyone simultaneously, it's likely Mojang's servers. If it's one player, it's their client or account.
See also: Troubleshooting | BungeeCord IP Forwarding
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