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)
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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?
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Toggle between Wi-Fi and mobile data, in case of network timestamp discrepancies.
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Confirm your device clock is accurate and not reliant on network time zones.
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If using an emulator or DMM client on PC, adjust your system timezone similarly.
🚫 When Other Errors May Appear
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Error Code 2507: Often tied to regional IP blocks—may require VPN with Japan IP.
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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.
