Hi Megan, 

Welcome to Box Community and glad to assist!

While we investigate, can you confirm if you received the collaboration invitation to access affected folder? If so, is there an error message when you try to access the folder? 

We'd love to further assist! 

I received one of the invites (I can see that folder), but when she sent me the other ones, I never received them.

Hello, Following up on this as I still can not see all the folders.