I can create any workout I want on Garmin connect and save them, but it won't let me send it to my device. This is a new problem, that turned up in the last month, I haven't had any issues in the past. I get a message that it's "preparing workout" and it never moves past that point. It can find the device, just won't send to it. Same result for my 500 and 510. Are others seeing the issue? Suggestions? I know I can build a workout on the device but that's a pain for a complicated one that has multiple sets of intervals.
