Hello
I’va a Coros for my running activities and i use Coros Hub Center for follow my calender/cTSS etc…
But i can’t upload my W.O on TD in the plateforme 
Only “fit” is accepted
As far as I know, you can’t upload workout files directly to Coros Hub. It will only sync plans from TrainingPeaks.
You can upload finished activities or sync them from other platforms.
https://support.coros.com/hc/en-us/articles/360052332691-How-to-download-workouts-and-training-plans-from-TrainingPeaks-to-your-COROS-watch