You tried to import your planting design into Revit through the 3D Connection and Planting F/X Revit Plugin, but received the following error when you clicked the Import button:
A 3D view is required to import.
You've likely missed the first step in importing your planting design: changing the view in Revit to a 3D view.
Follow the Before Importing Into Revit steps on our Revit Planting F/X Import tool documentation page. Once you've changed the view in Revit to 3D, you should be able to import successfully.