5 proven methods to solve netflix error code: m7121-1331

Netflix error code: m7121-1331
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The Netflix error code: m7121-1331 is occurring due to a problem in your browser.

M7121-1331 error is relatively small and does not require any specialist knowledge to understand.

According to Netflix, these errors occur if the browser does not meet the requirements for streaming video.

In some cases,

It also occurs when the Netflix server is unavailable for your geographic location.

The possible reason for occurring error code: m7121-1331  and the most effortless step-by-step troubleshooting.

Netflix Error Guide

Reason for occurring the Netflix error code M7121-1331


This error occurring is usually showing that something is wrong with your Browser. Below are reasons behind that problem can occur:

  • HTML 5 is not activated in your browser.
  •  HTML 5 is now the latest HTML version and is used by almost all major players in the streaming industry.
  • Chrome extensions conflict with the Netflix playback process.
  • Google Chrome is buggy and may not install properly.
  • There are bad cookies or cache that can prevent playback.
  • The Netflix server is down. In this case, obviously, wait for a few minutes.
  • Your browser is out of date

Pro Tip:

Before proceeding with the solutions, make sure that your computer has at least 20MBPS internet speed with administrator access.

Use of Netflix Friendly browser with pre enable HTML 5

Generally, Netflix supports playback in popular browsers like Chrome, Firefox, Edge, etc.

If you are using an unsupported browser such as Speed ​​Browser, you will be facing a video streaming problem.

HTML 5 is the latest markup language and is used by almost all major streaming platforms for their operations.

Also noted that,

HTML 5 is activated by default in all common browsers.

So if your browser doesn’t support or you’ve manually disabled it, make sure to get it back up and running before trying to stream again.

You can check that HTML5 is working in your browser by click here.

Ensure by Disabling extensions one by one

Chrome extensions are made for the user to extend their browser’s basic functionality.

There are some extensions used for video downloading.

If you’ve enabled Chrome Extensions for downloading purposes, you may experience problems playing Netflix in your browser.

error code: m7121-1331


We will disable them and then try streaming again.

Open Google Chrome and enter the following address in the dialog box:

chrome: // extensions

First, we disable all Extensions and check streaming working or not.

If Netflix streaming is working.

Then enable it one by one and check streaming working or not.

Now disable those extensions will cause a problem in streaming.

Check & Update the Widevine Content Decryption module

The last step to check before Reset and reinstalling Chrome is to know you’re your browser.

The Widevine content decryption module should be up to date. 

This module is used worldwide for encryption and secure license distribution. Since Netflix allows you to stream copyrighted material, this module is often used to run.

Widevine Content Decryption Module

Open Chrome and type in the search bar


scroll below until you see the Widevine Content Decryption Module.

Click on check for update, and then refresh your page.

Restart Chrome and check if the error disappears or continues.

Reset and Update All Browsers

Instead of reinstalling, I recommended resetting and updating your browser. Because some configuration files are not deleting while reinstalling,

There may be you may still face the same after reinstalling.


 we perform a browser reset, so all files are reset to default mode.

After checking for an update to update your browser.

Reset & update Mozilla Firefox

  • Open Firefox and click on the menu tab.
  • Go to Help and choose Troubleshooting Information.
  •  Now in under Give Firefox a tune-up section, click on Refresh Firefox.
Firefox tune-up section
  • The pop-up shows, confirm that by pressing on refresh firefox, this should complete resetting your browser.

  • After Reset your browser, let’s check your browser for an update.

  • Restart your browser and click on the menu tab.

  • Go to Help and click on About Firefox.

  • Firefox automatically updates if any new update is available.

Reset & Update Google Chrome

  • Click on the menu and go to settings.
  • In the settings tab, scroll down and go to advanced.
  • Find and select the Reset and clean up section.
Resetting Chrome
  •  Now click Restore settings to their original defaults.
  • Confirm with Reset settings to complete the process.
  • After Reset your browser, let’s check your browser for an update.
  • Restart your browser and click on the menu tab.
  • Now at the top, click on update.

Pro Tip:

If your version is up to date, your browser is not showing the update button.

Reset & Update Microsoft Edge

  • Click on the Menu tab and go to settings.
  • On the left side bottom, Clicks Reset settings.
  • Select Restore settings to their default values.
  • Confirm to Reset.
resetting microsoft edge
  • After Reset your browser, let’s check your browser for an update.
  • Restart your browser and click on the menu tab.
  • Navigate to help and feedback.
  • Click on About Microsoft Edge.
  • Microsoft edge automatically updates your browser.

Reset & Update From Safari

  • Click on Safari and go to Preferences.

  • Go to the Advanced tab.

  • Tick the Show develop menu in the menu bar.
  • In to develop menu clicks on Empty caches.
safari resetting
  • After Reset your browser, let’s check your browser for an update.

  • To download the latest version, click here from your Safari browser.
  •  If your browser is outdated, you have been seen as an update option.

Check the server status

If all of the above methods don’t work,

There have been a few cases where the error message occurred when the server was offline and inaccessible due to a server update or upgraded near your area.

So, probably the solution is to contact Netflix support.

Scroll below and choose your favorite option, call-us or live chat.

The bottom line

the bottom line

Now you know all 5 methods to solving Netflix error code M7121-1331.

Now it’s your turn to implement and solve your query.

Leave a comment to let me know which technique works for you. Don’t forget to share this article on social media.

Also, You like to read our other important article below.



I’m Gaurang Machhi – a Blogger, marketer, and Engineer who teaches people to solve technical problems and learn the latest tips & hacks. I am always passionate about searching online for new technology.

When I’m not working, I like to chill out with a good podcast, a good video game, or a good science fiction web series. My favorite web series is lost in space & favorite movie was Star Trek trilogy. I love planning, self-improvement, and watching a good thriller.

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