[Lux]

Originally Posted by diceboy L 08/20/2019 - 00:56:54: SourceMod error session started L 08/20/2019 - 00:56:54: Info (map "c2m1_highway") (file "errors_20190820.log") L 08/20/2019 - 00:56:54: [Witch_Target_patch.smx] Incorrect offset for 'WitchAttack::GetVictim'. L 08/20/2019 - 00:56:54: [Witch_Target_patch.smx] Error finding the 'WitchAttack::OnStart' signature. L 08/20/2019 - 00:56:54: [Witch_Target_patch.smx] Error finding the 'WitchAttack::OnAnimationEvent' signature. L 08/20/2019 - 00:56:54: [Witch_Target_patch.smx] Error finding the 'WitchAttack::Update' signature. Gamedata installed. Any help ?

This is a problem on your end.
update your l4d2 dedicated server to current version of the game.