Quick Summary
Error -101 in Minecraft typically indicates an authentication failure, meaning the game is unable to verify your ownership or login details. This can prevent you from accessing online services, realms, or even launching the game properly.
Common Causes
- Invalid Credentials: The username, password, or Microsoft account details entered are incorrect, expired, or have been changed since the last login attempt.
- Network Connectivity Problems: A poor or unstable internet connection can prevent the game from reaching the authentication servers to verify your account.
- Minecraft Server Issues: The Minecraft authentication servers may be experiencing outages or temporary maintenance, preventing successful login attempts.
- Corrupted Game Files: Damaged or corrupted Minecraft game files can sometimes interfere with the authentication process.
- Firewall or Antivirus Interference: Firewall or antivirus software may be blocking Minecraft's access to the internet, preventing it from authenticating.
- Outdated Game Version: Running an outdated version of Minecraft canSometimes cause compatibility issues with the authentication servers.
Step-by-Step Fixes
Method 1: Verify Login Credentials
Step 1: Double-check your username (or email address if using a Microsoft account) and password for typos.
Step 2: If unsure, try resetting your password through the official Minecraft website.
Step 3: Ensure you are using the correct login method (Mojang account vs. Microsoft account).
Method 2: Check Internet Connection
Step 1: Ensure you have a stable internet connection by browsing other websites or running a speed test.
Step 2: Try restarting your router/modem.
Step 3: If using Wi-Fi, try switching to a wired connection to rule out Wi-Fi issues.
Method 3: Restart Minecraft Launcher
Step 1: Close the Minecraft Launcher completely.
Step 2: Wait a few seconds, then relaunch the Launcher.
Step 3: Try logging in again.
Method 4: Restart Your Computer
Step 1: Save any important work.
Step 2: Restart your computer.
Step 3: After the restart, try launching Minecraft and logging in again.
Method 5: Check Minecraft Server Status
Step 1: Visit the official Minecraft website or a third-party server status tracker to check if the authentication servers are online.
Step 2: If there are reported outages, wait for the servers to be restored before attempting to log in again.
Method 6: Update Minecraft
Step 1: Open the Minecraft Launcher.
Step 2: Ensure you are using the latest version of the game. If an update is available, download and install it.
Step 3: Restart the Launcher and try logging in again.
Method 7: Disable Firewall/Antivirus Temporarily (Caution)
Step 1: Temporarily disable your firewall and/or antivirus software.
Step 2: Try launching Minecraft and logging in.
Step 3: If it works, add Minecraft as an exception in your firewall/antivirus settings.
Important: Re-enable your firewall/antivirus after testing to protect your system.
Method 8: Reinstall Minecraft
Step 1: Uninstall Minecraft completely from your computer.
Step 2: Download the latest version of the Minecraft Launcher from the official website.
Step 3: Install the Launcher and then install Minecraft again.
Step 4: Try launching the game and logging in.