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YouTube "There Was a Problem With the Server [400]"? How to Fix It

A "400" message looks alarming, but it isn’t a ban. In plain English, 400 is the standard web code for a "bad request": something about the request your app or browser sent couldn’t be understood. That often points to something on your side — cached data, cookies, an extension, the date and time, or a network tool — which you can fix, but it can also be a temporary YouTube problem.

Reviewed 9 min read 8 fixes Videos & playback

Quick answer

Start by closing and reopening the YouTube app (or reloading the page) and restarting your device. Then update the app or browser. In a browser, clear YouTube’s cookies and cached files and test without extensions. On Android, clear the YouTube app’s cache; on iPhone, offload and reinstall the app — the method YouTube’s own help recommends. Also check your date and time are set automatically and turn off any VPN or proxy.

Seeing something else?

Does this match what you see?

  • YouTube shows "There was a problem with the server [400]" in the app, often on the home feed or when opening a video.
  • The home page, comments or search results won’t load, but your internet otherwise works.
  • The error appears in one browser but not another, or on one device but not another.
  • It started after installing a browser extension, a VPN, or changing network settings.

AndroidiPhone & iPadComputer (browser)

Menu names vary by phone, app version and browser. The "[400]" wording is not listed on YouTube’s official error page, so the exact message may also differ.

What "error 400" actually means (in plain English)

Every time you open a video, your app or browser sends a request to YouTube. Web servers reply with a numbered status code. Codes in the 400s mean the server thinks the problem is with the request it received; codes in the 500s mean the problem is on the server’s side.

400 means "bad request" — YouTube couldn’t understand or accept what was sent. Despite the wording "problem with the server", that points to something on your device, browser or network.

Why this happens: the possible causes

YouTube’s official help doesn’t document this specific message, so treat the causes below as the usual triggers for a 400-type error rather than confirmed explanations. Check them in order — the first ones are the quickest to check.

Where you see the error and what to try first
Where you see itPossible triggerDo this first
YouTube app on AndroidDamaged cached data or an outdated appFix 2 then Fix 5
YouTube app on iPhone or iPadDamaged cached data or an outdated appFix 2 then Fix 5
Browser on a computerCorrupt cookies or cache, or an extension changing the requestFix 4 and Fix 6
Every device on one networkA VPN, proxy, DNS setting or network filterFix 7
Only after changing the clock or travellingWrong date, time or time zoneFix 3
  • Corrupt cookies or cached dataCheck this first

    Browsers and apps store cookies and temporary files for YouTube. If they become damaged or out of date, the request YouTube receives can be malformed. Clearing them is one of the steps in YouTube’s own troubleshooting.

  • An outdated app or browserCheck this first

    YouTube recommends updating the app or browser when videos won’t play. Old versions can send requests the service no longer accepts.

  • A browser extension or ad blockerPossible

    Extensions that change pages or block content can interfere with how YouTube loads. YouTube’s help suggests testing without extensions or ad blockers.

  • Wrong date, time or time zonePossible

    Secure web connections rely on accurate time. A manually set or wrong clock is one possible trigger for connection errors.

  • A VPN, proxy or DNS problemPossible

    Network tools that reroute or filter traffic can cause requests to fail. YouTube’s help includes checking DNS settings.

  • A temporary YouTube-side problemLess likely

    Rarely, many people see errors at once because of a problem on YouTube’s side. If so, waiting is the only fix.

Try these 60-second checks first

  • Pull down to refresh, or reload the page.
  • Try the same video on another device or network. If it works there, the cause is on your original device or network.
  • Sign out of YouTube and back in — YouTube’s help suggests signing in when you see errors.
  • Lower the video quality from the video’s settings (gear) menu and try again.

How to fix it, step by step

Work through these in order. They start with the quickest, safest checks and only move to steps that sign you out or remove data later.

Fix 1: Close and reopen YouTube, then restart your device

Safe & reversible3 minAndroidiPhone & iPadComputer (browser)

YouTube’s official troubleshooting starts here. It clears a stuck session without changing any settings.

iPhone & iPad

  1. Swipe up from the bottom of the screen and pause, then swipe the YouTube preview up to close it.
  2. Restart your iPhone: hold either volume button and the side button until the slider appears (iPhone X and later), drag it, wait 30 seconds, then hold the side button to turn it on.

Android

  1. Close YouTube from your recent apps screen, then reopen it.
  2. If the error returns, press and hold the power button and tap Restart.

Computer (browser)

  1. Close all YouTube tabs and quit the browser completely.
  2. Reopen the browser and go to youtube.com.

Did it work? The home feed loads and videos play without the 400 message.

Fix 2: Update the YouTube app or your browser

Safe & reversible3 minAndroidiPhone & iPadComputer (browser)

YouTube’s help lists updating the app or browser as a core fix for video errors.

iPhone & iPad

  1. Open the App Store > your account icon > scroll to App Updates.
  2. Tap Update next to YouTube.

Android

  1. Open Google Play > your profile icon > Manage apps & device > Updates available.
  2. Tap Update next to YouTube.

Computer (browser)

  1. In Chrome: menu (⋮) > Help > About Google Chrome — it checks for updates automatically. Other browsers have a similar About page.
  2. Restart the browser when prompted.

Did it work? The error no longer appears after updating.

Fix 3: Set your date and time automatically

Safe & reversible2 minAndroidiPhone & iPadComputer (browser)

An incorrect clock can break secure connections. This is quick to rule out, especially if you’ve travelled or changed the time manually.

iPhone & iPad

  1. Open Settings > General > Date & Time.
  2. Turn on Set Automatically.

Android

  1. Open Settings > System > Date & time (names vary by phone).
  2. Turn on Set time automatically and Set time zone automatically.

Computer (browser)

  1. On Windows: Settings > Time & language > Date & time > turn on Set time automatically.
  2. On Mac: System Settings > General > Date & Time > turn on automatic setting.

Did it work? Your device shows the correct local time and YouTube loads.

Fix 4: Clear YouTube’s cookies and cached files in your browser

May sign you out3 minComputer (browser)

Damaged cookies are one possible cause of a 400 error in browsers, and clearing cache and cookies is part of YouTube’s official troubleshooting. Clearing cookies signs you out of the affected sites.

Computer (browser)

  1. In Chrome: menu (⋮) > Delete browsing data (or Settings > Privacy and security > Delete browsing data).
  2. Tick Cookies and other site data and Cached images and files. Choose a time range (try Last 7 days first, then All time if needed).
  3. Click Delete data, then reopen youtube.com and sign in again.
  4. Other browsers have equivalent options under Privacy or History settings.

Clearing all cookies signs you out of most websites. To limit this, clear data only for youtube.com and google.com from your browser’s site settings if it offers that option.

Did it work? YouTube loads in your normal browser window and you can sign back in.

Fix 5: Clear the YouTube app’s cache (Android) or offload and reinstall (iPhone)

Safe & reversible3 minAndroidiPhone & iPad

These are the methods in YouTube’s own streaming-troubleshooting help. They remove damaged temporary files without deleting your subscriptions or history, which are stored in your Google Account.

iPhone & iPad

  1. Open Settings > General > iPhone Storage > YouTube.
  2. Tap Offload App, then tap Offload App again to confirm.
  3. Tap Reinstall App, then open YouTube.

Android

  1. Open Settings > Apps (or Applications) > YouTube.
  2. Tap Storage (or Storage & cache) > Clear cache.
  3. Reopen YouTube.

Apple says offloading keeps the app’s documents and data. If you later delete and reinstall the app instead, downloaded videos will need downloading again.

Did it work? The home feed and videos load normally.

Fix 6: Test without extensions or ad blockers

Safe & reversible5 minComputer (browser)

YouTube’s help recommends testing with extensions and ad blockers turned off. A private window is the fastest way to check, because most extensions are off there by default.

Computer (browser)

  1. Open a private/incognito window and go to youtube.com.
  2. If YouTube works there, open your browser’s extensions page (in Chrome: chrome://extensions).
  3. Turn off extensions one at a time, starting with ad blockers and privacy tools, and reload YouTube after each.
  4. Keep the one that causes the error turned off, or check for an update to it.

Did it work? YouTube works in your normal window with the problem extension off.

Fix 7: Turn off VPNs and proxies, and check your network or DNS

Safe & reversible5 minAndroidiPhone & iPadComputer (browser)

If every device on the same network shows errors, something on the network is the likely cause. YouTube’s help suggests checking DNS settings, and VPNs or proxies can interfere with requests.

  1. Turn off any VPN or proxy app and try again.
  2. Switch to a different network (for example from Wi-Fi to mobile data).
  3. Restart your router: unplug it for about 30 seconds, then plug it back in.
  4. If you’ve changed DNS settings on your device or router, switch back to automatic (your provider’s default) and test again.

Did it work? YouTube works on your usual network again.

Fix 8: Reinstall the YouTube app

May sign you out5 minAndroidiPhone & iPad

A clean install is the last on-device step. Your subscriptions, playlists and history are tied to your Google Account, but you’ll need to sign in again.

iPhone & iPad

  1. Touch and hold YouTube > Remove App > Delete App.
  2. Reinstall from the App Store and sign in.

Android

  1. On many Android phones YouTube is pre-installed and can’t be fully removed. Instead open Settings > Apps > YouTube > the menu (⋮) > Uninstall updates, then update it again from Google Play.
  2. If YouTube can be uninstalled, touch and hold it > Uninstall, then reinstall from Google Play.

Did it work? The reinstalled app loads without errors.

Seeing YouTube errors on a smart TV, console or streaming stick?

The phone and browser steps above don’t all apply on a TV. YouTube’s own troubleshooting suggests a full power cycle for TVs:

  1. Unplug the TV or streaming device from the power socket (not just standby).
  2. Wait at least 30 seconds, then plug it back in.
  3. Restart your router too if other apps are also slow.
  4. Check for a system update and a YouTube app update in the device’s own settings (menu names vary by brand).

On a school or work network, video sites can be filtered or restricted. Test on another network before changing settings.

Other YouTube errors and what they mean

These are the messages as people report seeing them. The exact wording on your screen can differ by app version, language and region, so match the meaning, not every word.

There was a problem with the server [400]
What it usually means
Not listed on YouTube’s official error page. "400" is the standard code for a bad request — usually caused by damaged cookies or cache, an extension, wrong time settings or a network tool.
What to do
Follow the fixes on this page in order, starting with Fix 1.
An error has occurred.
What it usually means
One of the general errors listed by YouTube. Often a connection or temporary playback problem.
What to do
Reload, check your connection and restart the app or browser.
Playback error. Tap to retry.
What it usually means
The video couldn’t start or keep playing, often because of the connection.
What to do
Tap to retry, lower the quality, or switch networks.
Connection to server lost.
What it usually means
Your device lost its connection to YouTube.
What to do
Check Wi-Fi or mobile data, then reload.
This video is unavailable.
What it usually means
The video may be private, removed or restricted where you are. This is usually not a fault you can fix.
What to do
Check you’re signed in to the right account; otherwise try another video.
Something went wrong. Tap to retry.
What it usually means
A general app error.
What to do
Tap retry, then close and reopen the app.
Error loading the page, please try again.
What it usually means
A page (home, comments or search) couldn’t load.
What to do
Refresh, check your connection, then clear cache.

How to know it worked

  • The YouTube home feed, search and comments load without any error.
  • A few different videos play from start to finish.
  • The error doesn’t come back after closing and reopening the app or browser.

Still not working? Your next steps

  1. Try YouTube on a different device and network. If it fails everywhere, wait — it may be a temporary YouTube-side problem.
  2. If it fails only in one browser, use another browser while you check extensions and settings.
  3. Use YouTube’s official troubleshooting pages (below) and send feedback from the app or site (usually under your profile picture > Help & feedback).

Official help routes

These links go to YouTube’s official help on Google’s support site. SocialAppFix is not affiliated with YouTube or Google.

Frequently asked questions

Does YouTube error 400 mean I’m banned?

No. A 400 is a technical "bad request" error, not an account action. Account problems show their own notices.

Why do I only get error 400 in one browser?

That browser probably has damaged cookies or cache, or an extension that interferes with YouTube. Clear YouTube’s cookies (Fix 4) and test without extensions (Fix 6).

Will clearing the YouTube app cache delete my subscriptions?

No. Subscriptions, playlists and history are stored in your Google Account. If you delete and reinstall the app (rather than offload it), downloaded videos will need downloading again.

Is YouTube down right now?

If the error appears on several devices and networks and other people report it at the same time, it may be a YouTube-side problem. If only you are affected, the fixes on this page are the place to start.

Can an ad blocker cause YouTube errors?

It can. YouTube’s own help suggests testing without extensions or ad blockers when you see errors.

Sources and how we checked this guide

We base steps on the platforms’ own help pages and the phone makers’ official guides. Menu names change often and can differ by device, app version and region. Where a platform page could not be independently read, we link it so you can check the current wording yourself.

  1. Troubleshoot YouTube video errors (external site, opens in a new tab)YouTube Help · checked 20 October 2026
  2. Troubleshoot streaming & video issues – Android (external site, opens in a new tab)YouTube Help · checked 20 October 2026
  3. Troubleshoot streaming & video issues – iPhone & iPad (external site, opens in a new tab)YouTube Help · checked 20 October 2026
  4. Close an app on your iPhone or iPod touch (external site, opens in a new tab)Apple Support · checked 20 October 2026
  5. Restart your iPhone (external site, opens in a new tab)Apple Support · checked 20 October 2026
  6. How to manually update apps from the App Store (external site, opens in a new tab)Apple Support · checked 20 October 2026
  7. How to check the storage on your iPhone and iPad (external site, opens in a new tab)Apple Support · checked 20 October 2026
  8. Fix an installed Android app that isn’t working (external site, opens in a new tab)Android Help · checked 20 October 2026
  9. How to update apps on Android (external site, opens in a new tab)Google Play Help · checked 20 October 2026

Last reviewed 20 October 2026 by the SocialAppFix editorial team against the sources above. Next scheduled review: 18 April 2027. How we write and review guides.

What changed
  • 20 October 2026: First published.
  • 20 October 2026: Editorial audit corrections applied.

SocialAppFix is an independent guide and is not affiliated with or endorsed by Google or YouTube. We never ask for passwords, login codes or payment to fix an account.