What is the procedure to become a coach (in intervals.icu)

So far I am impressed with the software!
I was redirected here from this post.

I coach junior rowers exceeding competition rowing for our local club, we were in the process of starting to use intervals.icu. We need Strava as a bridge between the Concept2Log and intervals.icu.

We connected all rowers and set me up as their coach, however I am not able to see their activities yet, only the warning icon with the text that strava data is not available. Is there something that I am missing?