Error with all downloads

[Colin S]

Fatal error: Access level to IPS\nexus\_Customer::$loggedInMember must be public (as in class IPS\Member) in /home/xaviat/public_html/x-pilot.com/forums/applications/nexus/sources/Customer/Customer.php on line 504

That is the error which I get (and all that shows up on the entire screen) when I try to visit any part of the downloads area. Further information can be provided at request, I just don't know what else you'd need to solve this. Cheers