How to Fix IIS Express HTTPS Error

Problem:

You have created an ASP.NET web application with HTTPS.

You ran the application on https://localhost:5001 and got the “ERR_CONNECTION_RESET” error.

Solution:

1. Open Command Prompt with admin rights.

2. Type and press Enter

cd "C:\Program Files (x86)\IIS Express"

3. Type and press Enter

IISExpressAdminCmd.exe setupsslUrl -url:https://localhost:5001/ -UseSelfSigned

Change 5001 in the command above to the port you’re trying to use.

 

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