Got ZorinOS and Insync starts perfectly but once you set it up (Which works fine) then it never actually initiated the transfer. It sits at “No Ongoing Transfers” and the green check box is on the icon like the transfers are completed but they actually never started.
Could you right-click the empty space and select “Sync all items”? After which, if you want to auto-sync new files in the future, go to FOLDER SETTINGS > Sync new children of partial folders. Let me know if this works for you.