We recently switched to a new web host, I thought I had all the links working but just found out a good number of them don’t. My apologies. I’ve fixed the core rulebook download so that works again. The Players Handbook and the setting book links all work but some of the other downloads still don’t. I’ll be hunting these down and fixing them shortly.
Update: I found the problem. It was a small configuration error which has been corrected.
Awesome, thanks M!