SOLUTION
This means that you are missing the right for using it. Create it with Netsh Commands for Hypertext Transfer Protocol > add urlacl.
Open "Command Line Interface (CLI)" called "Command shell" with Win+R write "cmd"
Open CLI windows like administrator with mouse context menu on opened windows or icon "Run as administrator"
Insert command to register url
netsh http add urlacl url=http://{ip_addr}:{port}/ user=everyone
Note
- For remove you can use:
netsh http delete urlacl url=http://{ip_addr}:{port}/
- If not work restart Microsoft Windows (WIN) and then open project and build again.
- Sometimes these symptoms may be the same like "Unable to launch the IIS Express Web server”.