You’re encountering Error Code 205 in Uma Musume Pretty Derby, which typically appears when trying to use the daily “stopwatch” (alarm watch) feature to retry a race.
Here’s a detailed explanation and solution:
⚠️ Why It Happens (Cause)
The bug arises because the game’s time-based logic for daily retries resets at 5:00 AM JST. If your device’s timezone differs significantly from Japan (especially behind), the client-side logic may falsely believe you have a “free retry”, but servers do not recognize it. This mismatch triggers Error 205: “Communication error”.
🛠️ How to Fix It
✅ Set Timezone to Japan Standard Time (UTC+9)
Adjust your device’s timezone to JST (UTC+09:00), disable any automatic time syncing that applies local offsets, and then fully close and restart the game app. This aligns your device’s time window with the server’s reset logic.
✅ Wait for the Next Server Reset
If the error occurs, waiting until the next 5:00 AM JST can help—especially if you’re behind JST. After that, combined with timezone adjustment, the retry logic should sync correctly.
📋 Troubleshooting Checklist
| Step | Action |
|---|---|
| ⏰ | Set your device timezone to Japan Standard Time (UTC +9). |
| 🔄 | Fully close the game (kill process) and restart. |
| 🕓 | If still failing, wait until after 5 AM JST local time before retrying. |
| 🚫 | Avoid using VPNs during retry—may interfere with logic. |
| 📲 | Restart device if issues persist. |
| ⚠️ | Do not trigger the “free stopwatch” when you haven’t actually earned it (server mismatch). |
💬 Real-User Reports
“I consistently get error code 205 when trying to use the stopwatch… I think it’s a bug regarding the daily stopwatch refresh… Quit the game, set my phone’s time zone to Japan, and then I was able to retry the race.”
“Changing your time zone to Japan time did solve it for me”
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❓What If It Still Happens?
Toggle between Wi-Fi and mobile data, in case of network timestamp discrepancies.
Confirm your device clock is accurate and not reliant on network time zones.
If using an emulator or DMM client on PC, adjust your system timezone similarly.
🚫 When Other Errors May Appear
Error Code 2507: Often tied to regional IP blocks—may require VPN with Japan IP.
Error Code 102: Login-related communication problem—try reconnecting or switching networks.
✅ Final Suggestion
Set your device to Japan timezone (UTC+9), fully restart the game, and wait if needed until after the server daily reset at 5 AM JST. That should resolve Error 205 and restore the retry functionality.
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