Re: Friend Request
Hm. It appears to me you are already a member of snape_potter on IJ (and not just 'watching' the community), so you should be able to view all entries posted here. The only exception would be if someone posted to the community with a link to offsite either to their personal journal or an archive and then they require additional steps (like friending them) to see the entries.
Is there a particular entry you can't access? Anything from the fest should be viewable to all members.