Hi, George. Happy to help clarify, those workouts and Workout Alternates aren’t necessarily ‘broken’, its just that not every workout has an Alternate always available!
There are two reasons this can happen. Workout Alternates always have the same workout profile and difficulty as your original workout. Some workout profiles include many workouts, while other profiles don’t have as many. If there are no other workouts of the appropriate difficulty level and duration available for Workout Alternates to choose from within a workout profile, no results will be shown.
The second reason: Workout Alternates reference an athlete’s progression levels when determining which workouts to suggest. Suggested workouts are within the same Difficulty level as the original workout, but suggestions are never shown in the “Not Recommended” range. If the original workout is “Not Recommended” it will thus have no alternates available.
Let us know if you have any questions about that, but hopefully that provides some context and clarification. More info here under ‘FAQ’: https://support.trainerroad.com/hc/en-us/articles/4402284012571-How-to-use-Workout-Alternates