WordPress 4.6 Release Candidate 1 was installed today and caused a plethora of problems. The main problem was the immediate White Screen. This appears to have been caused by a conflict with WP Multi Network 1.7.0. We came to that conclusion after getting Ajorel to cooperate with all the other plugins we had installed. I specifically say Ajorel because somewhere in the process we lost AJC. Hopefully we’ll get that back tonight.
During the triage we deleted P3 (Plugin Performance Profiler), Shiny Updates, WordPress MU Domain Mapping, and WP Rollback. Shiny Updates has partially be added to Core in version 4.6 so it was deleted to see if it was the cause of the conflict. The others weren’t being used so there was no need to keep them around.