WordPress auto-update bricked my multisite. I got this network, 12 sites, all on the cheapest CloudCone plan. WP 6.4 auto-updated last night and now everything 500. Main site loads but all subsites white screen. I think it's plugin conflict but I got like 30 plugins and no staging. I tried disabling all via FTP rename, no dice. Then I remembered I used some custom mu-plugin from a tutorial here like 2 years ago for domain mapping. Something about sunrise.php? Can't even find the original post now. Anyone else hit this? I got clients waiting and my restore from CloudCone is from March, that's 5 months of content gone. Help