Hello, puzzles on my server is not working also cave elevators is gone! 

NullReferenceException: Object reference not set to an instance of an object This spawning my log!

Dont know where i can post my problem so i postet it here. Hopefully somone will find a solution! 

I got another server with exactly same plugins and mods, never had this problem! 

Also wrote to my support and get this answer

Greetings,
Unfortunately, we've received intermittent reports regarding this occurring.
Ultimately, the root problem is down to a bug within the game.
Something occurs along the way while the current world is used, and the puzzles break. As to why this is the case is unknown.
However, considering after each wipe the puzzles have functioned for a few days before then ceasing, it indicates an internal problem.
Unfortunately, there aren't any solutions available. This is a problem that the developers will ultimately need to correct.
Thanks.

Please help!

NullReferenceException: Object reference not set to an instance of an object at DoorManipulator.IOInput (IOEntity from, IOEntity+IOType inputType, System.Single inputAmount, System.Int32 slot) [0x0003c] in :0 at IOEntity.IOInput (IOEntity from, IOEntity+IOType inputType, System.Single inputAmount, System.Int32 slot) [0x00032] in :0 at ORSwitch.IOInput (IOEntity from, IOEntity+IOType inputType, System.Single inputAmount, System.Int32 slot) [0x00076] in :0 at IOEntity.IOInput (IOEntity from, IOEntity+IOType inputType, System.Single inputAmount, System.Int32 slot) [0x00032] in :0 at CardReader.IOInput (IOEntity from, IOEntity+IOType inputType, System.Single inputAmount, System.Int32 slot) [0x0001d] in :0 at IOEntity.Solve () [0x00039] in :0 at IOEntity.MarkDirty () [0x00011] in :0 at IOEntity.MarkDirtyUpwards () [0x00032] in :0 at IOEntity.MarkDirty () [0x00000] in :0 at IOEntity.MarkDirtyUpwards () [0x00032] in :0 at IOEntity.MarkDirty () [0x00000] in :0 at PressButton.Press (BaseEntity+RPCMessage msg) [0x0001c] in :0 at PressButton.OnRpcMessage (BasePlayer player, System.UInt32 rpc, Network.Message msg) [0x000e5] in :0 UnityEngine.DebugLogHandler:Internal_LogException(Exception, Object) UnityEngine.DebugLogHandler:LogException(Exception, Object) UnityEngine.Logger:LogException(Exception, Object) UnityEngine.Debug:LogException(Exception) PressButton:OnRpcMessage(BasePlayer, UInt32, Message) BaseEntity:SV_RPCMessage(UInt32, Message) ServerMgr:OnRPCMessage(Message) ServerMgr:OnNetworkMessage(Message) Facepunch.Network.Raknet.Server:ConnectedPacket(Connection) Facepunch.Network.Raknet.Server:Cycle() ServerMgr:Update()