Not sure if its due to AutoRegLib or Quark.
ServerCrashLog.txt

attached is the log but these two lines stuck out to me

04.08 05:47:24 [Server] modloading-worker-0/ERROR [ne.mi.fm.lo.RuntimeDistCleaner/DISTXFORM]: Attempted to load class net/minecraft/client/gui/screens/inventory/tooltip/ClientTooltipComponent for invalid dist DEDICATED_SERVER
04.08 05:47:24 [Server] modloading-worker-0/ERROR [ne.mi.fm.ja.FMLModContainer/LOADING]: Failed to create mod instance. ModID: quark, class vazkii.quark.base.Quark