How to Solve the “Crbug/1173575, non-JS module files deprecated” Error?

The “Crbug/1173575, non-JS module files deprecated” error frequently occurs when we encounter problems with the connection in the Chrome browser. Following the explanation below to understand better.

What causes the “Crbug/1173575, non-JS module files deprecated'” error?

This error occurs whenever connectivity can’t be established.

Here, we access the learnshareit website but get a problem with the connection so the error will log to the Chrome Devtools console panel.

How to solve this error?

Check the network panel in the Chrome DevTools

  • Open DevTools by pressing Control+Shift+J or Command+Option+J (Mac). Click the Network tab.
  • Select No throttling from the Network throttling drop-down menu next to the Disable cache checkbox.

If you select Offline or Slow 3G, the browser simulates a slow network or offline connection and, therefore, can not establish a connection to the server.

Check the URL

Making a mistake when typing the URL is also the reason for this error.

We start the server at http://localhost:3000 but access it through https://localhost:3000, so we can’t connect to the website. Note that Chrome browser may auto-redirect HTTP to HTTPS for secure websites, so to work with HTTP in testing, you can Delete domain security policies in Chrome settings.


Sometimes you can’t connect to a website because your IP address has been banned for violating privacy policy or geography. You can use some VPN services to connect to that website.

The VPN stands for Virtual Private Network. It replaces your IP address with the IP address of the VPN server and establishes a protected connection to the destination network. The VPN encrypts your internet traffic and disguises your online identity. You can learn more about the VPN here.

In the example below, we tried to access the medium website, but it has been banned from our geography.

Check the debug configuration file

You can check the debug configuration file if you use a debugger in the editor. In this case, we create a React application using the create-react-app tool and start debugging the app in the Visual Studio Code editor. So there’s a file for debugging configuration called "./vscode/launch.json" in the root project.

When running this app, the local server will serve the website at http://localhost:3000. Hence, to run debugging successfully, you must ensure the url property in the "./vscode/launch.json" file matches the URL. If you make changes in the file, you should restart the editor or re-run the web server to ensure the changes are applied.

You can change the default port number in the create-react-app project here.


There are many reasons for the “Crbug/1173575, non-JS module files deprecated” error, which seems to occur whenever connectivity can’t be established in the Chrome browser. We hope reading this article helps you solve the problem. If you have any questions, please feel free to comment below.

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