Https Localhost11501 2021 _verified_ -

Start the server that previously used that port. If you don't know which server, check:

Check if port 11501 is listening and which process is using it.

: Open services.msc and verify that the specific development server or Microsoft Dynamics instance status is marked as "Running". 2. Check for Port Conflicts

Locate your NavSettings.json or web.config file in the web client folder. https localhost11501 2021

: Another local service is already utilizing port 11501.

If you see https://localhost11501/2021 in old notes, try guessing the intended format: https://localhost:11501/2021 (port after colon) or https://localhost:11501/2021/ (trailing slash).

Port 11501 is not a standard well-known port (like 80 for HTTP or 443 for HTTPS). In 2021, many developers chose high-numbered ports to avoid conflicts with system services. Start the server that previously used that port

When working with local secure environments, you will frequently encounter connection failures or SSL warnings. Here is how to resolve the most common issues.

SSL Certificate ErrorsBecause "https" is used, your browser might block the connection if the local certificate is self-signed or expired. You may need to click "Advanced" and "Proceed to localhost (unsafe)" to bypass the warning, provided you trust the software.

Check the server logs. If you only need HTTP temporarily, try http://localhost:11501 (but HTTPS-required features will fail). If you see https://localhost11501/2021 in old notes, try

Use http://localhost:11501/2021 instead, or configure SSL for your local server.

It looks like you are referencing a URL or local server address: https://localhost:11501 with the year 2021 .