There’s a larger issue TR are working to resolve. I had the same issue with iPad and iPhone this morning. I emailed support. Reply from them below. I was able to load my workout on my MacBook and got it done.
“Unfortunately, we’re having issues across all the TrainerRoad Apps and the Website. We have all hands on deck working to resolve this issue, and I’ll send you an update as soon as we make any progress.
Hang tight. We hope to have this resolved very soon.”