Only way I could get it to work was change to classic view. That allowed me to select a training plan and then I could see it in the modern view.
Thread semi-hijack... Has anyone found a way to upload a tcx training plan to GC calendar? In example, Endomondo (a Garmin partner?) makes training plans and allows export to tcx files. I can't find a way to upload to the GC calendar such that I can then send them to my 910xt... Anyone try/been successful?