Participants can't join group challenge

[TouchstoneFMS]

I've created a group challenge, but some people are unable to join without signing up for a free trial. The challenge currently has 9 members, so the participant limit isn’t the issue, and some of the new members haven't used up their 2 free group challenge slots.

Could someone help explain why this is happening and how I can resolve it?

[Scout · Accepted solution]

Hey @TouchstoneFMS, 
Thanks for your post and sorry for the confusion. We recently made some changes to our Group Challenges.

Group Challenges can only be created by subscribers and athletes with a free trial subscription. Previously, other athletes received three free challenges to create or join. You can read more about this update here:

Changes to Strava Group Challenges