Getting No Daylight
One possibility for not seeing the impact of daylight on your building's floorplate is that some component of the project did not import properly. Try using the "Element Selection" section of the daylight page to toggle the visibility of different building components. Zoom in to the areas with glazing and double-check whether every object has imported properly and was given the appropriate mesh property (transparent objects are a translucent blue, and opaque objects are translucent grey). The most common cause is that a user may have accidentally imported building geometry in front of their window objects, or did not import window geometry at all. Sending a screenshot to the live-chat team would also be useful for identifying the issue.
If the objects you imported are all incorrectly categorized the most common scenario is that with the Revit plugin, a user did not have the categories 3D Layer pulled up on screen during the export of that category. The correct workflow is opening the 3D View, then selecting to export geometry of that titled category with the plugin command. Example, Open "3D - cove.tool windows", click the "Export Windows" button, then proceed to the next export category by launching the next 3D View.
Getting 100% Daylight
Only one noted cause, you imported a roof as a floor object and thus have 100% exposure to direct solar rays. Solution, repeat the export process and place building geometry in correct export categories.