How To Fix "Bad Login" - Minecraft Server

Seeing a “Bad Login” error pop up in Minecraft can be annoying, especially when you’re just trying to hop onto a server.

This issue usually means your session with Mojang or Microsoft’s authentication servers has expired or isn’t syncing properly. It can happen after switching accounts, staying logged in too long, or trying to connect too quickly after a restart.

Thankfully, the fix is usually simple and only takes a few steps. In this guide, we’ll show you how to fix "Bad Login" Minecraft and cover:

• Restarting the Minecraft launcher

• Logging out and back in

• Resetting your session ID

• Checking for account conflicts

What Is The "Bad Login" Error?

The "Bad login" error in Minecraft is a common issue that blocks players from joining servers, but you can fix it by restarting the launcher, reconnecting with your Microsoft account, resetting your password, or enabling offline mode on the server to continue playing.

Why Does The "Bad Login" Error Happen?

• You’re logged into the same account on multiple clients or instances.

• The session expired because the launcher was left open too long before joining a server.

• The server is set to online mode, but your account failed to authenticate.

• Mods or custom launchers sometimes cause login conflicts.

• A temporary issue with Mojang/Microsoft authentication servers.

How To Fix The "Bad Login" Error

• Restart the Minecraft launcher and sign in again with your Microsoft account.

• Close all other instances of Minecraft using the same account.

• Reboot your PC or internet router to refresh your connection.

• Check the Mojang/Microsoft server status in case the login servers are down.

• If you own the server, you can enable offline mode as a temporary solution.

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Updated on: 18/09/2025