The logging still happens, but we moved it out of the Windows logs to better identify what messages are from Duplicati and which are from Windows.
You can find the logs under “Applications and Services Logs” and the “Duplicati 2”:
That sounds like an issue with the TLS (aka SSL) certificate not being trusted by your system?
Duplicati uses .NET, which in turns looks at the operating system’s certificate stores.
So if your operating system trusts the certificate, Duplicati will as well.
Note that this is not the same as the browser trusting the certificates, as the browsers may ship with their own list of trusted certificates.