While browsing the web with your Google Chrome browser, if you frequently see the error message ERR_SPDY_PROTOCOL_ERROR, here are some simple solutions that will fix your problem. ERR_SPDY_PROTOCOL_ERROR can occur on WordPress sites, sites which are using nginx server, Cloudflare, etc. The SPDY Protocol was developed by Google to reduce page loading time. However, it was discontinued due to HTTP 2 vulnerability. Although this error is quite unusual in the latest version of Google Chrome, if you see it, here is how to solve it.
ERR_SPDY_PROTOCOL_ERROR error in Chrome
1] Update browser
As mentioned earlier, this feature was introduced a long time ago, and Google has now discontinued it. Therefore, there is almost no way you can find this protocol in the latest version of Google Chrome. In other words, if you are using an old version of Google Chrome, there is a high chance of getting this error message while browsing some websites. Therefore, you should update your browser as soon as possible. If that doesn’t help you, you may need to uninstall and reinstall the browser.
2] Flush Socket
If you have updated the browser or you are already using the latest version of Google Chrome, you can flush Socket to check whether it solves your issue or not. For that, enter the following URL in your URL bar in Google Chrome –
You will find a button called Flush socket pools.
Click on it to flush the socket. After doing that, restart your browser and try opening the same website.
3] Disable HTTPS Scanning
If you are using an internet security program, there is a high chance that your security shield scans the HTTPS sites for the certificate before opening them in the browser. If you are getting the issue with all the sites, you can try disabling HTTPS scanning in your antivirus. You should also check the 3rd party firewall software if you are using any.
Although these are the primary solutions to this problem, you can also try these following things –
Hope something helps!