The server runs fine, but every player gets rejected — because a Workshop mod updated and the server hasn't caught up. Why B42 servers drift out of date, the clean-restart fix, and how to move the breakage to 4am.
B42 lag comes in three flavours with three different fixes. Tell GC stutter from simulation load from one player’s bad Wi-Fi, then apply the right one — including the animal-population dial B41 admins don’t know about.
The most common Build 42 server problem: mods that won't load. B41-only mods, semicolon syntax, Workshop download stalls, load order and client mismatches — diagnosed in order of likelihood, with a working end-to-end example.