How to Fix Umamusume Error Code 390?

1. What is UmaMusume Error Code 390?

UmaMusume connection error 390 is a common connectivity issue that prevents the game from launching or syncing properly with the server. When this error appears, the game fails to load data or connect to DMM servers, resulting in an interruption of gameplay. Essentially, it signals that your device cannot establish a stable connection to the Umamusume servers.

This issue is often caused by network instability, firewall or antivirus interference, server-side problems, or corrupted game files. Understanding the root cause will help you apply the correct solution effectively.

2. Main Causes of Umamusume Connection Error 390

The connection error UmaMusume usually occurs due to one or more of the following reasons:

• Unstable Internet Connection: Fluctuating Wi-Fi or mobile data can prevent the game from connecting to servers.
• Server Issues: Scheduled maintenance or unexpected server downtime can trigger the error.
• Conflicts with DMM Launcher: The game may fail to communicate with DMM properly.
• Corrupted Game Files: Missing or corrupted game data can block normal gameplay.
• DNS or Network Restrictions: Certain DNS settings or network limitations may cause connectivity issues.

Knowing these causes helps target the right fix quickly and prevents repeated interruptions.

3. How to Fix Umamusume Error Code 390 Step-by-Step?

Below are the most effective solutions for resolving UmaMusume error code 390, which typically means the game is unable to connect properly to the servers.

Fix 1: Download All Data from Title Screen Menu

One of the most recommended fixes, especially on Steam or mobile, is to fully download any pending game data from within the game. This ensures all assets are present and prevents partial downloads from blocking connectivity.

• Open UmaMusume and wait until the title screen loads. Tap or click the menu icon usually at the bottom right.

• Select Download All Data (sometimes labeled download pending updates).

  

• Wait until the download completes fully. Then, relaunch the game and test if the error is resolved.

Fix 2: Switch Networks

Weak or unstable connections often trigger this connection error UmaMusume. Switching between different networks helps your device establish a fresher connection.

• Turn off your current Wi-Fi connection. Connect to mobile data OR a different Wi-Fi network.

  

• Wait a few seconds for network stabilization, then open UmaMusume again to see if the issue is fixed.

Fix 3: Restart Your Device and Router

Restarting devices clears temporary issues with network handshakes. Many players find this simple restart helps clear the 390 code.

• Close UmaMusume and any background apps. Power off your phone/PC completely.

• Unplug your router for 30 seconds. Next, turn the router back on and let the network reboot.

  

• Then restart your device to launch the game and check for the error.

Backing up your system and game data is one of the best ways to protect yourself if errors like UmaMusume error code 390 cause data corruption or loss. 4DDiG Windows Backup is a user-friendly tool that lets you create full backups of your Windows system, important files, partitions, or even your entire game installation drive. With backups ready, you can easily restore everything if something goes wrong.

Why 4DDiG Windows Backup is a Must-Have

• Complete System Protection: Back up everything, your OS, installed games, apps, and settings, in a single operation. No more worrying about partial backups or missed files.
• Selective or Full Backups: Only need your UmaMusume folder or entire C: drive? You decide. It’s flexible for every type of user.
• Safe and Easy Restoration: Lost files, system crashes, or corrupted game data? Restore everything effortlessly.
• Beginner-Friendly Interface: You don’t need to be a tech expert, the intuitive interface guides you through every step.

Backing up isn’t just a precaution, it’s smart gaming strategy. When your data is safe, troubleshooting connection error UmaMusume becomes stress-free.

• First, connect an external hard drive or USB stick where you want to save your backup. Then, open 4DDiG Windows Backup and click “Create a Backup Task”. This is where the backup journey begins.

  

• Next, choose the drives or folders you want to protect. This could be your system drive, game files, or any important folders. After that, click the folder icon to tell 4DDiG where to save your backup, make sure it’s your connected external drive.

  

• Once you’ve selected everything, click “Start Backup”. A pop-up will ask you to confirm, just hit Confirm and let 4DDiG do its thing.

  

• Now, just sit back and wait. How long it takes depends on how much data you’re backing up and the speed of your drives. When it’s finished, your system and game files are safe. You can now unplug your drive or leave it connected for future backups.

  

Knowing your files are protected gives peace of mind, especially when troubleshooting UmaMusume error code 390 or other game issues.

Fix 4: Repair Game Files (PC/Steam)

For PC players (especially on Steam), corrupted files can cause server connection errors. Verifying or repairing fixes missing or broken files.

• Open Steam and go to your Library. Right-click UmaMusume: Pretty Derby and choose Properties.

• Go to Installed Files and click Verify Integrity of Game Files.

  

• Wait for the process to finish. Then, restart the game.

Furthermore, this method can also be used to fix errors in many other games, like Liar's Bar crashing. It helps detect and repair corrupted or missing game files, making it a reliable solution for various game crashes, launch failures, and error codes across different titles.

Fix 5: Resolve DMM Conflicts (PC)

If you have previously used the DMM version of UmaMusume and now use Steam, data overlaps can cause connection error UmaMusume.

• Close UmaMusume and the Steam client. Navigate to the folder where the DMM version is installed.

• Rename the Umamusume folder (e.g., Umamusume_DMM_Backup).

  

• Restart Steam and launch the game again.

Fix 6: Change DNS Servers

Changing DNS to a public one like Google’s can improve connectivity and fix connection timeouts. This helps especially if your ISP’s DNS is slow or restricted.

• Open Control Panel > Network and Internet > Network Connections.

• Right-click your network and choose Properties.

• Select Internet Protocol Version 4 (TCP/IPv4) and click Properties.

• Choose Use the following DNS server addresses. Enter:

  • Preferred DNS: 8.8.8.8

  • Alternate DNS: 8.8.4.4

  

• Save and restart your PC. Try launching UmaMusume. Sometimes, this fix also works for Windows update error 0x8024402c.

4. Prevention Tips for Avoiding Future Umamusume Issues

No one wants to see UmaMusume error code 390 pop up again, especially after spending hours on your team. The good news is, a few simple habits can help you avoid most connection problems in the future.

• Keep Your Internet StableA strong, consistent connection is key. If possible, use wired Ethernet on PC or a reliable Wi-Fi network on mobile. Avoid switching networks while the game is running.
• Update RegularlyAlways make sure both the game and the DMM/Steam launcher are up to date. Updates often fix bugs and improve server connections.
• Repair Game Files PeriodicallyEven if the game seems fine, corrupted files can sneak in after updates or crashes. Verifying or repairing files occasionally prevents unexpected errors.
• Watch for Server MaintenanceSometimes errors aren’t on your end. Check official channels for server updates, playing during maintenance often triggers connection issues.
• Close Background AppsRunning too many apps at once can slow your network or interfere with the game. Close unnecessary programs when playing UmaMusume.

Conclusion

Seeing UmaMusume error code 390 can be annoying, but most connection problems are easy to fix. Downloading all game data, switching networks, repairing files, or changing DNS usually solves the issue.

To avoid losing your progress in the future, it’s a good idea to back up your system and game files regularly. 4DDiG Windows Backup makes this quick and easy. With it, you can restore your game and system anytime, so you can enjoy UmaMusume without worrying about errors or lost data.