Synology Drive Mac - Failure to Download On-Demand Sync

When trying to download files from my NAS via the Synology Drive Mac Client I get a message saying it cannot complete the operation because it isnt supported. I am attempting to download specific files and folders via the cloud icon on the file itself

Is anyone else seeing this? I am finding Syn Drive a bit inconsistent and unreliable for use as a cloud service replacement, much as I would like it to be