: Temporarily disable the Windows Defender Firewall on both machines to see if the download succeeds. If it does, create specific exceptions for WinCC and SQL Server processes.
: Ensure the correct network adapter (the one connecting your ES and OS/Client) is selected. wincc viewer rt download fix
: Delete or rename the existing XML file to force a re-configuration. Standard File Locations : : Temporarily disable the Windows Defender Firewall on
