Sharing lessons

When I want to share a lesson I get this message :
Champs “image”: You must have an image to share a lesson.
What does that mean? What do I have to do?

I guess those text strings are partially translated. All it means is that a lesson must have an image before it can be shared.

But this lesson belongs to a collection which has no image. I didn’t have this problem for the other lessons.

Yes, but we want all lessons to have an image and this should have been a restriction all along. We have fixed it now. This means that if a course does not have an image, individual lessons do need one. If a course has an image, then individual lessons from that course can use that image without having their own image.