If you’re encountering “The specified key does not exist” error for a Vue.js app deployed on S3 with CloudFront, it’s likely due to CloudFront caching or misconfiguration. Here are some steps to troubleshoot and fix the issue:

1. Check S3 Bucket Configuration

Ensure that your S3 bucket is configured correctly to serve your Vue.js files. Make sure the files are uploaded to the correct path in the bucket and have the correct permissions.

2. Invalidate CloudFront Cache

If you’ve recently updated your Vue.js files, CloudFront might be serving stale content from its cache.

Try invalidating the CloudFront cache to force it to fetch fresh content from your S3 bucket.

To do this:

• Go to the CloudFront console.
• Select your distribution.
• In the “Invalidations” tab, create a new invalidation for the path of your Vue.js files (e.g., /index.html or /*).
• Confirm the invalidation.

3. Check CloudFront Origin Settings

Ensure that the CloudFront distribution is configured to use the correct origin (your S3 bucket) and that the origin settings are configured correctly.

To do this:

• Go to the CloudFront console.
• Select your distribution.
• Check the “Origins and Origin Groups” tab to ensure that the origin points to the correct S3 bucket and the correct path.
• Verify the origin settings, such as origin protocol policy, origin access identity, etc.

4. Check CloudFront Behavior Settings

Verify the behavior settings in your CloudFront distribution to ensure they are configured correctly for your Vue.js application.

To do this

• Go to the CloudFront console.
• Select your distribution.
• Check the “Behaviors” tab.
• Ensure that the caching behavior is configured appropriately (e.g., caching behavior for static assets, TTL settings).
• Verify that the “Default Root Object” is set to index.html or your desired entry point.

5. Verify DNS Configuration:

Ensure that your DNS settings are correctly configured to point to your CloudFront distribution. If you’re using a custom domain, verify that the DNS records are correctly set up to resolve to the CloudFront distribution.

6. Check Vue Router Configuration:

If you’re using Vue Router and encountering this issue when navigating to specific routes, ensure that your Vue Router configuration is correct. Make sure that the routes defined in Vue Router match the paths served by your S3 bucket and CloudFront distribution.

By following these steps, you should be able to troubleshoot and fix the “The specified key does not exist” error for your Vue.js app deployed on S3 with CloudFront.