There could be several reasons for this error, such as
incorrect configuration settings,
network issues, or
You can try checking your firewall settings, resetting your network settings, or using a
Could you please check and eliminate you are none of the cases How to Fix the ERR_CONNECTION_RESET Error in Chrome: 7 Quick Ways?
If none of above works for you, suggest you can process with the following:
- Check the
Sitecore logs of the not running instance to confirm if it's working ok or with any
exception/errors. Look for any error messages or exceptions that may be related to the issue.
Restart the IIS app pool to verify if it's a web server issue. Sometimes, the issue may be related to the web server rather than the Sitecore instance itself.
- If the issue persists, you could try
reinstalling the Sitecore instance with a
If you have any further questions, please don't hesitate to connect with me.