Quick Summary
The error "Failed to synchronize registry data from server, closing Minecraft" indicates a problem with the data transfer between your Minecraft client and the server. It usually means there's a mismatch or corruption in the data being exchanged, leading to a disconnection.
Common Causes
- Mod Mismatch: The most common cause is a mismatch in installed mods between the client and the server. If you have mods that the server doesn't, or vice versa, this synchronization error is likely to occur.
- Corrupted Mod Files: Damaged or corrupted mod files on either the client or the server can disrupt the data synchronization process.
- Server-Side Issues: Problems with the server itself, such as resource constraints or software issues, can hinder the server's ability to properly synchronize data with clients.
- Network Connectivity Problems: Unstable or intermittent network connections can interrupt the data transfer, leading to synchronization failures.
- Incompatible Minecraft Versions: Running different Minecraft versions (e.g., client on 1.19, server on 1.20) will cause errors.
Step-by-Step Fixes
Method 1: Verify Mod Compatibility (Client & Server)
Step 1: Ensure both you and the server are using the exact same versions of all mods.
Step 2: Check the server's mod list and compare it with your client's mod list.
Step 3: Remove any mods from your client that are not present on the server, and vice versa.
Step 4: If using a modpack, make sure the modpack versions match on both the client and the server.
Method 2: Reinstall/Update Mods
Step 1: Delete all mods currently installed in your Minecraft mods folder.
Step 2: Download fresh, up-to-date versions of all your mods from a trusted source, ensuring they are compatible with your Minecraft version.
Step 3: Reinstall the mods into your mods folder.
Step 4: Restart Minecraft and try connecting to the server again.
Method 3: Restart Minecraft and Your Computer
Step 1: Completely close Minecraft.
Step 2: Restart your computer.
Step 3: Launch Minecraft and try to connect to the server again. This can sometimes resolve temporary glitches.
Method 4: Check Your Internet Connection
Step 1: Ensure you have a stable internet connection.
Step 2: Try restarting your router/modem.
Step 3: If using Wi-Fi, try switching to a wired connection for a more stable connection.
Method 5: Ensure Minecraft Versions Match
Step 1: Confirm that both your Minecraft client and the server you are connecting to are running the exact same Minecraft version.
Step 2: Update or downgrade your client version as necessary to match the server.
Step 3: Contact the server administrator to confirm the server version.