Hello! I have a school district that shared folders with me in the fall.  Now, I need to add some more info to them. But...When I click on each of these 3  links or the invite emails, it tells me that I still do not have access to them.  That they have been 'removed or are unavailable'.  The district has verified that I'm a collaborator, but all our information is gone and unavailable.  They are also stumped and don't know what to do? Any advice?