How to Fix Minecraft ‘Failed to Authenticate Your Connection’

Quick Fix

Try this first (takes under a minute):

1. Log out and back in. In the Minecraft Launcher, click your username in the top-right corner, select Logout, then log back in with your credentials.
2. Restart the launcher completely. Close it fully via Task Manager (end any 'Minecraft' or 'Java' processes) before reopening.
3. Try Direct Connect. From the server list screen, click Direct Connect and type the server address directly (for Hypixel, try stuck.hypixel.net) instead of joining from the saved server list.

Step-by-Step Guide

What this error means

The 'Failed to Authenticate Your Connection' error appears when trying to join a Minecraft multiplayer server. The error appears when attempting to join a Minecraft server, blocking access to multiplayer gameplay, and typically points to a bug within the Minecraft server itself, common on servers like Hypixel. This specific error is usually caused when the Minecraft servers are experiencing problems or your internet connection is unstable. In short, it's a session-handshake failure between your launcher, Mojang/Microsoft's authentication servers, and the game server you're joining — the cause can be on your end (login session, network, firewall) or on the server's end (bugged authentication service).

Fix 1: Re-authenticate your account

1. Fully quit the game. Use Quit Game inside Minecraft, then close the launcher, and confirm no Minecraft or Java processes remain in Task Manager.
2. Log out. Open your Minecraft launcher and click on the Username icon at the upper right corner, then select the Logout option from the drop-down menu.
3. Log back in with your Microsoft/Mojang credentials and try connecting to the server again.
4. Reset your password if needed. Go to the Mojang website and select Login, click Forgot Password, enter your registered email, and follow the email instructions to reset your password. Then log in again and retry.

Fix 2: Restart the launcher and force-close background processes

1. Open Task Manager. Right-click the taskbar and choose Task Manager, or press Ctrl + Shift + Esc (Windows).
2. End Minecraft-related tasks. Go to the Processes tab, find all processes related to Minecraft, right-click and select End task to close it entirely, repeating for anything with Minecraft in the name.
3. Wait a minute, then relaunch the Minecraft Launcher fresh and attempt to reconnect.

Fix 3: Power-cycle your router and check your connection

1. Unplug your router. Power off the router by unplugging the power cable from the wall outlet, and locate the power button on the back of the router.
2. Wait 15-30 seconds before plugging it back in and powering it on again — this clears a corrupted internet cache that can block a secure connection to Minecraft's servers.
3. Run a speed test (e.g. Fast.com) to confirm your connection is stable before retrying. Minecraft will have a hard time authenticating your connection if your internet is unstable, so you can verify this by running a speed test to measure your upload and download speed.

Fix 4: Use Direct Connect instead of the server list

1. Open the server list screen in Minecraft's Multiplayer menu.
2. Click Direct Connect. Click on the Direct Connect button at the bottom of this screen, then in the pop-up window type stuck.hypixel.net and click on the Connect button (replace with your target server's address if it's not Hypixel).
3. Wait for the connection to establish and check if the error is gone.

Fix 5: Check your Hosts file and firewall/antivirus

1. Remove leftover 'account-cracking' tool entries. Uninstall MCLeaks (or similar applications) via Apps and Features, then run a thorough system scan with an antivirus or antimalware tool like Malwarebytes. These tools modify your Hosts file and break real authentication.
2. Edit the Hosts file (Windows). Open Notepad as Administrator, go to File > Open, change the file type to All Files, open the Hosts file, use Find in the Edit menu, and search for Mojang, removing all related entries. Save the file and retry.
3. Allow Minecraft through your firewall. Allowing Minecraft through your firewall lets the game's data move freely between your device and the server, preventing connection blocks. Check Windows Defender Firewall (or your third-party antivirus) settings and add an exception for the Minecraft launcher and Java executables.

Fix 6: Update Minecraft and try a different server

1. Check for game updates. An outdated client can conflict with server-side changes. Launch the game and let it auto-update, or check the launcher's Latest Release option.
2. Test a different server. If only one server (e.g. Hypixel) fails, the issue is likely server-side congestion or a bug — try another server to confirm.
3. Wait it out if it's server-side. If the problem lies with the server, the only recourse is patience — monitor the server's website or social media channels for updates and resolutions.

When to get more help

If none of the above works, and the error happens on every server you try (not just one), the problem is likely on Mojang/Microsoft's authentication service itself — check Minecraft's official status channels or support site. If it only happens on one specific server (like Hypixel), reach out to that server's official support/Discord, since it may be a known outage on their end rather than something fixable on your PC. This issue can affect Windows, Mac, and Linux Java Edition launchers similarly, since it is tied to the account authentication step rather than your operating system.