I also got this error, but it wasnāt due to several sites (my IIS installation had only one site with one binding).
Running netstat -ano nothing while listening on port 8624 .
The problem was that the URL reservation was generated earlier for another web server. I was able to query the ACLs of URLs using the following command in PowerShell as administrator:
netsh http show urlacl
To remove it, enter the following (replace the last argument with the reserved URL from the show urlacl request):
netsh http delete urlacl http:
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