We are running PRTG 188.8.131.521. Since recently upgrading we cannot access the website on the server where it is installed - reporting the Webpage is unavailable. Via PRTG Enterprise Console it reports "Not Connected (IIS 7.5 detailed error - 404.0 - Not FoundServer". However, accessing via the local loopback address\ICON on the desktop "PRTG Network monitor" 'https://127.0.0.1/home' and can work that way. I'm unsure how to troubleshoot, the website is not defined in IIS. Attempting to add it via IIS using the 'webroot' directory did not work - saying process was already in use.