WORK-OUT on ipad ou Android smartphone?

Hello everyone,

I’m using personal workouts on my PC with my home trainer.
The old work-outs They all appear correctly on the PC
on the tablet (ipad) or my phone (android Samsung s21+)
it no longer works:
I see all the old personal work-outs that I installed several months ago, but not the latest ones installed recently.
I don’t understand why it used to work but doesn’t any more.
Do you have any idea what my problem is ?