Hi All -
I have a project with both a 2D map and a 3D scene in ArcGIS Pro (2.6.1). The project also contains several layouts, each of which contains a single map frame referencing the 2D map. When I attempt to export the layout as either a PDF or image file (i.e. TIFF, JPG, PNG, etc.), I receive the following error dialogue box:
"Object reference not set to an instance of the object."

Upon acknowledging the dialogue box the Export Layout panel states "Export Failed" in red; however, no additional information or error code is provided.
I've tried adding / deleting layouts with no success.
Any thoughts on what is causing the error?