Netflix Error Code UI-400: How to Fix It

Easy 5-30 minutes Medium Severity Verified June 2026
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Error Code
UI-400
Brand
Netflix
Product Type
streaming
Severity
Medium
DIY Difficulty
Easy
Estimated Fix Time
5-30 minutes
Netflix error code UI-400 means that a request made by the Netflix app failed and could not be completed. This is typically caused by a temporary glitch in the app, corrupted cached data, an outdated app version, or a connectivity hiccup between your device and Netflix's servers. In most cases, you can resolve this error quickly by refreshing the app, clearing cached data, or checking your internet connection.
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Tools You'll Need

How to Fix Error Code UI-400

  1. Retry the Request

  2. Check Netflix Server Status

  3. Restart the Netflix App

  4. Restart Your Device

  5. Check and Restart Your Internet Connection

  6. Clear the Netflix App Cache and Data

    Clearing app data on some devices may sign you out of Netflix. Make sure you know your Netflix email and password before proceeding.

  7. Update the Netflix App

  8. Update Your Device's System Software

  9. Reinstall the Netflix App

    You will be signed out of Netflix after reinstalling. Have your login credentials ready.

  10. Try a Different Network or Device

  11. Disable VPN or Proxy Services

  12. Contact Netflix Support

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When to Call a Professional

Netflix error UI-400 is a software and connectivity issue that does not require professional help in the traditional sense. However, if you have exhausted all troubleshooting steps and the error only occurs on your home network, consider contacting your Internet Service Provider (ISP) to rule out DNS or firewall issues on their end. If the error is account-specific and persists across all devices, contact Netflix Support directly at help.netflix.com, as there may be a server-side or account-level issue that only their technical team can resolve.

Frequently Asked Questions

What does Netflix error code UI-400 mean?
Netflix error code UI-400 means a request made by the Netflix app failed. This usually happens due to a temporary glitch in the app, corrupted cached data, an unstable internet connection, or a brief issue on Netflix's servers. It is rarely a serious problem and can typically be fixed in a few minutes.
Why do I keep getting error UI-400 on Netflix?
If error UI-400 keeps coming back, the most common causes are a persistent internet connection problem, an outdated Netflix app, corrupted app data, or a VPN or proxy service interfering with Netflix. Try clearing the app cache, updating the app, and checking that your internet connection is stable. Also make sure you are not using a VPN.
Does Netflix error UI-400 mean my account is banned?
No, error UI-400 is not related to account suspension or banning. It simply means a network request from the app failed. If your account were suspended, you would see a different error message specifically about your account status.
How do I fix Netflix UI-400 on a smart TV?
To fix UI-400 on a smart TV, start by restarting the TV and your router. Then go to your TV's Settings, find the Apps section, select Netflix, and clear its cache and data. If that does not work, check for a Netflix app update in the smart TV's app store, or uninstall and reinstall the Netflix app.
Does Netflix error UI-400 happen because of Netflix being down?
It can. If Netflix's servers are experiencing an outage or high traffic, you may see error UI-400. Check downdetector.com or status.netflix.com to see if Netflix is reporting service issues. If there is an outage, simply wait until Netflix resolves the problem on their end.

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