Guide To Fix Youtube Error 400 reporting “Client has issued a malformed or illegal request”


While facing the Youtube Error 400, the reason behind this error is client error due to invalid message request. In this tutorial, we will guide you through simple methods how to resolve this error. Simply follow this article and you are good to go.

What is the Youtube Error 400?

I’ve seen error a lot myself while surfing videos on Youtube. This error frequently pops up while you are looking at videos (like me), or your browser is doing something you aren’t even aware of, like attempting to use something that has already been cached.


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Methods To Fix Youtube Error 400

Follow the steps below carefully in order to fix this issue.


Guide To Fix Youtube Error 400 reporting Client has issued a malformed or illegal request

Step 1: Deleting the gsScrollPos cookie via siteData

You need to delete the site cookies which are responsible for this issue.

Simple open the Google Chrome and then type the “chrome://settings/siteData” in the address bar.


Locate the search bar in the chrome interface and type “youtube” and press enter. This will display two different types of cookies. Here, you need to click on the “Remove all shown” button to delete all the youtube cookies.

Step 2: Remove The gsScrollPos cookie Using Developer Tools

Click on Google chrome application to open it. Go to youtube and then press ctrl+shift+i to open developer tools.

In Developer tool, click on more icon “>>” and then choose “Application”.

Now, locate the “cookies” option and expand it, then select the “link associated with Youtube”.

Search or find every cookies that start with “gs” and then select them to “delete”.

Make sure that all the cookies have been deleted that start with “gs” and then reload the page. Finally, the youtube will start working again.

Another thing we recommend is completely clearing the cache (back to the beginning of time). And if nothing else works, try re-installing your web browser application.

Did this tutorial solve the error for you? Let us know in the comment section if you are experiencing any additional problems related to this post.

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