Fixing the 'Failed to load resource: net::ERR_BLOCKED_BY_CLIENT' Error

Fixing the 'Failed to load resource: net::ERR_BLOCKED_BY_CLIENT' Error

Introduction

The 'Failed to load resource: net::ERR_BLOCKED_BY_CLIENT' error is a common issue encountered by web developers. This error occurs when a browser extension, typically an ad blocker, blocks a resource from being loaded. In this article, we'll explore some solutions to identify and fix the 'ERR_BLOCKED_BY_CLIENT' error.

Solution 1: Check for Ad Blockers or Browser Extensions

Step 1: Disable Browser Extensions

The first step in resolving the 'ERR_BLOCKED_BY_CLIENT' error is to identify whether an ad blocker or another browser extension is causing the issue. To do this, disable all browser extensions and then reload your web application to see if the error persists.

In Google Chrome, follow these steps:

  1. Click the three-dot menu in the upper-right corner of the browser window.
  2. Go to 'More tools' > 'Extensions'.
  3. Disable all extensions by toggling the switch next to each extension.

Step 2: Identify the Problematic Extension

Once you've disabled all extensions, reload your web application to see if the error is resolved. If the error no longer appears, you can determine which extension is causing the issue by re-enabling extensions one by one and reloading your web application until the error reappears.

Step 3: Inform Users or Create a Workaround

After identifying the problematic extension, you can either inform your users about the issue or create a workaround in your application that handles the blocked resource gracefully.

Solution 2: Review Your Content Security Policy (CSP)

If disabling browser extensions doesn't resolve the issue, you may have a Content Security Policy (CSP) in place that is blocking the resource. To fix the 'ERR_BLOCKED_BY_CLIENT' error, review your CSP and ensure it allows the resource in question.

For example, if your CSP is blocking an image from a specific domain, update your policy to include the domain in the 'img-src' directive:

  1. <meta http-equiv="Content-Security-Policy" content="img-src 'self' https://example.com">

Conclusion

The 'Failed to load resource: net::ERR_BLOCKED_BY_CLIENT' error can be challenging to diagnose and fix, as it often involves issues with browser extensions or content security policies. By following the solutions outlined in this article, you can identify the root cause of the error and implement appropriate fixes to ensure a seamless user experience in your web application.

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