Content Sharing Enabled NOT working

My content sharing enabled is not working on my new campaign and my players have trouble accessing the classes and books that I have. 

I have a master Tier. 

Is there a problem?

What, specifically, are they having trouble accessing?

Do they have characters in the campaign?

Have you enabled content sharing on five campaigns already?

So there is a limit of 5 campaigns? 

Quote from FaDmtl >>

So there is a limit of 5 campaigns? 

 

Yes. Each user can only enable content sharing on 5 campaigns at a time. If you're hitting the limit, you can turn it off on old ones you're not using anymore, or you can ask someone else in the campaign who has a master-tier subscription to enable it; it doesn't have to be the DM who enables it.

(Though, you said it was enabled on yours, and if that's the case then the problem is something else.)