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<job> --> Show log --> Remote is the operations done to the remote. An empty list means no remote files not no source file selection. Now that you’re sort of used to looking at remote operations, please look over About --> Show log --> Live --> Retry log during a failed run. If you notice a problem, try clicking on the line.
Errors (as opposed to warnings) often land in About --> Show log --> Stored. Click on a line to see details.
SMB file shares not connecting - Duplicati as Service is debug for new issue of Windows 10 version 2004. The Event Viewer technique might apply here if there’s actually an SMB level issue (that’s not clear yet…).