Uma Musume: Pretty Derby players have recently reported encountering Error 102, issue that prevents access to the game and often appears after long play sessions or during login attempts. While the issue is often related to server instability, it can also be triggered by local device issues or corrupted data. This article provides a detailed, step-by-step guide to fix Error 102.
What Is Error 102 in Uma Musume?
Error Code 102 is a general connection failure or data handling error that prevents the game from proceeding past the title screen. Based on current findings, it may appear due to:
- Server-side disruptions (common cause)
- Data desynchronization after lengthy gameplay sessions
- Finishing specific in-game events or races (especially with certain characters)
- Poor or unstable network connections
- Device-level cache or permission issues
Step-by-Step Fix Guide
1. Check Server Status
Before performing any local fixes, confirm whether the issue is affecting all players or just you:
- Visit Uma Musume’s official Twitter account or subreddit
- Check for maintenance announcements or error reports from other players
- If servers are down or undergoing maintenance, wait 15–30 minutes, then retry
2. If You Are the Only One Affected
a. Force Stop the Game
- On Android: Long-press the app > Tap App Info > Force Stop
- On iOS: Swipe up the app from the multitask screen
b. Clear Cache and Storage
- Go to App Info > Storage > Clear Cache
- If you continue to face issues, you may also attempt Clear Storage (but this risks local data loss if not backed up)
c. Allow Full App Permissions
- Navigate to App Info > Permissions
- Enable all critical permissions (e.g., storage, network)
d. Reboot Your Device
- After performing the above steps, reboot to clear memory and reinitialize the network stack
e. Switch Network Connection
- Try toggling between Wi-Fi and Mobile Data
- Disable any VPN services or region blockers
One player noted a VPN conflict blocked data download—switching network resolved the problem — Steam Discussion Board
3. Advanced Solutions (Use with Caution)
a. Download All Data
- On PC or DMM: Use the “Repair All Data” option
- On Mobile: Use the in-game Settings > Download All Assets
- This will force re-download of all game data, which has helped players bypass Error 102
“It asked me to download 4 GB. Still failed, then another 50 MB, still failed.”- User, Steam Discussion Board
b. Delete User Data
- This fix has worked for some, but it’s very risky if your account isn’t linked
- Only proceed if your account is linked to Twitter, DMM, or Google
WARNING: If your game account is not linked to Twitter, DMM, or Google, deleting user data will result in permanent account loss.
c. Create a New Account (Temporary Workaround)
- Several users confirmed the issue only affects their main account, not alternates
- As a short-term solution, playing on a new account may let you access the game until the issue is patched
Known Error Triggers in Gameplay
In some cases, Error 102 appears right after:
- Completing a Career Mode race or mission
- Playing specific characters like Special Week or Cap
This indicates the issue may be partially caused by internal game bugs tied to certain event sequences.
What to Avoid
- Do NOT delete app data unless your game is properly linked to an external account.
- Avoid using VPNs unless they are set to Japan. VPN interference is a common issue.
- If repair/download fails repeatedly, don’t force too many attempts within a short time—wait and retry later.
When to Contact Support
If none of the above methods work:
| Platform | Support Action |
|---|---|
| DMM (PC) | Use the built-in DMM support form |
| Android/iOS | Visit https://umamusume.jp and use the “Contact Us” option |
Include:
- Your Trainer ID
- A clear description of the issue
- Steps you’ve already tried
Tip: Support teams are slow during maintenance windows or high-traffic periods, so include as much detail as possible for faster help.
Final Recommendations
- Always link your account before reinstalling or resetting data
- If you’re affected during a specific mission or race, avoid repeating that path on your alt until a patch is confirmed
- Stay updated via official Uma Musume socials or Discord for emergency notices
Error 102 in Uma Musume is a disruptive issue, but with patience and careful troubleshooting, it can often be resolved without sacrificing your account or reinstalling the game entirely. Follow the guide above step by step, avoid unsafe actions, and contact support if necessary.
If the problem persists for more than 24 hours, check Reddit or Discord to see if others are facing the same. In many cases, the community discovers fixes before official support responds.
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