Email invites not received for two Cloud spaces

[Scott_Gilbert]

I have a R Studio Cloud space for a class I'm teaching: https://rstudio.cloud/spaces/58818

I have invited each student to join the space, but one student reports they didn't receive the email. I have a similar situation in another class, for which the Cloud space is: https://rstudio.cloud/spaces/57849

I think I can fix the (apparent) problem by making both spaces public, but am wondering if there is a way to make the invites work. (I sent an invite again, student reports they did not receive.)

[Scott_Gilbert]

Fortunately all my students are now members in their R Studio Cloud spaces, thanks very much. This online resource is amazing, especially in the current pandemic situation!