Lagos, Nigeria

YouTube error 400: Your client issued a malformed or illegal request [FIX]

Even though the site is constantly being developed and improved, sometimes some unexpected errors can show up. That’s the case with the Error 400: your client has issued a malformed or illegal request and today we’ll take a look at it.

A lot of users reported the Error 400 in YouTube, and although is an old and known issue, the cause is still a a mystery to Google. Let’s find out how to fix it.

Fixing YouTube error 400: Your client has issued a malformed or illegal request, usually involves clearing all the cookies. The error is mainly caused by shared cookies between YouTube and other extensions. If this action doesn’t solve the problem, you need to clear the specific faulty cookies from Developer tools or use Incognito mode.

It seems that the error is caused by an extension called The Great Suspender. This extension shares the cookies with YouTube and sometimes alters them, leading to the appearance of the Error 400.

How to solve error 400 in YouTube?

1. Use Opera

Opera is one of the most popular browsers of the moment due to the fact that it’s a fast search engine with a built-in ad blocker and a free VPN that keeps your internet experience safe and productive.

One important aspect of the Opera platform is that it uses less processing capacity than any other browser, this way you are guaranteed to always enjoy smooth online surfing.

You’ll be delighted with the user-friendly interface that makes possible chatting and browsing at the same time thanks to the built-in messenger on the side-bar of the page.

Another fun characteristic is the customizing feature that allows you to choose from a variety of themes. You can keep your favorite sites one click away by bookmarking them and save loads of time.



Enjoy safe and fast online browsing sessions with a search engine built to to make your work-flow easy and fun!

2. Clear the cookies from Chrome’s settings

  1. Open Chrome.
  2. Go to Settings, click Advanced, access Content settings.
  3. Click Cookies, then pick See all cookies and site data.
  4. Type youtube, in the search-bar from the top-right of the page
  5. All the cookies related to YouTube should appear. Click on Remove all shown or choose only the faulty ones called gsScrollPos-[4-digit number].

Alternatively, you can do the same process by opening a new tab in Chrome and by typing in the address bar: chrome://settings/siteData .

3. Clear cookies using Developer Tools

  1. Open Chrome, go to YouTube site.
  2. On your keyboard press Ctrl + Shift + I.
  3. In the Developer Tools click More and then Application.

4. In the left panel, under Storage, expand Cookies, all the cookies should appear.

This post was written by Vlad Turiceanu and was first posted to WindowsReport

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