UPDATE (September 11, 8:50 a.m.):
Katie sez:
As you all know, LibGuides has been experiencing some major network slowness. This slowness began on Thursday—resolved itself—and returned with a vengeance yesterday. This resulted in Springshare, the company that owns LibGuides, to actually shut down the system for about 20 minutes yesterday afternoon. This allowed them to restart all servers after they had completed some tinkering on their network.
They reported as of 12 hours ago that all problems have been resolved. I have tested access to the Articles and Databases pages and everything is loading normally.
Pages are still sometimes slow to load, still giving error http messages and not loading lists of databases. Katie has reported it and they are looking into it.