teach yoga class to a bunch of lemons?

Do you have mods in the game? Have you tried removing them and repeating the process to see if that fixed anything?

I have noticed the same thing yesterday, but I wanted my sim to join a class; And they were just standing there while the Yoga Teacher did all the moves.

I don't have mods, no CC.

I have no problems whatsoever. My only problem is that some spas / gyms don't give access to some mats if the random placement of Sims is in a bad order (the Sim can't walk past another and gives up and just stand there. Also Sims who's hygiene goes red will break and walk off).

I also have no issues with guided meditation.

I only have MCCC, no other mods whatsoever.

I just sent my sim Juliette to the park to teach a yoga class. Everyone participated and paid at the end. Juliette has level 10 wellness and has completed the Inner Peace and Zen Guru aspirations but not the Self Care Specialist.

https://i.imgur.com/AmcOBD5.png

No I don't have mods or CC. I removed them ages ago and just been playing vanilla for a while now.