Community Tip - Fixing ERR SPDY PROTOCOL ERROR

Try the suggestions in this Community Tip to help you fix ERR SPDY PROTOCOL ERROR when visiting a site.

The Error ERR_SPDY_PROTOCOL_ERROR while visiting a site indicates a network error that is preventing the page from loading. If you’ve restarted your browser, updated Google Chrome, tried in incognito mode, and flushed and renewed your IP, try the Quick Fix Idea below to address the issue.

Quick Fix Ideas

  1. If you are not the site owner, contact the site owner and let them know you are having issues accessing their site.

  2. Short term, change your :orange: to :grey: which would bypass Cloudflare. This is not optimal, but would fix the problem in the short term by taking Cloudflare out of the mix for anything but simple DNS resolution.

  3. There is a mismatch between the Content-Length header you are sending and the actual content-length.

  4. Fix your origin response headers. For Apache, review this. If you’re using a hosting service, please contact your hosting provider to make this change for you.

  5. Upgrade to Pro in order to disable http/2.

Lite Reading

Research The Issue

If You Need More Help
This community of other Cloudflare users may be able to assist you, if not, login to Cloudflare and then contact Cloudflare Support. When you contact support, make sure to include as much of this information as possible: the specific error message you are seeing, the URLs this is happening on, screen shot of the error, steps to reproduce the error, and HAR file(s). When you contact support, indicate which of the Quick Fix Ideas you’ve tried in order to help Customer Support help you.

If the issue is reproducible when downloading a file, open Chrome with no other window or tab then visit the download file. But, before downloading the file, open a new tab then visit chrome://net-export/ and start logging network information into disk. After that proceed to download the file to reproduce the problem. After reproducing the problem, stop logging network information to disk and share the file with us so we may examine.

Expert Comments Appreciated
This Community Tip will remain open for input from Community experts and those familiar with this issue. We really appreciate comments like: “What are the three things to always try”, or “Do this first” or “In my experience”.

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