Support knows best and is the quickest to provide up-to-date info (and in this instance, the action items to help restore Workout Creator).
From the ‘Welcome to the TrainerRoad Forum’ Page:
Have a question about the app, your training plan, or device? Reach out to support@trainerroad.com instead of posting here. Our support team has the best visibility and insight into your devices, workouts and adaptations, and will help get you the most efficient and effective answer to your question.
Closing this thread to prevent further confusion for other athletes experiencing this (as troubleshooting can vary greatly between devices), and to reduce some forum clutter for the multiple threads like this. Cheers!