Rust Server with custom map

Hello,
I have a problem with custom map on my server. Basicly while im trying to join into server i got message in server console and getting disconnected:

"Flap disconnecting: Exception (cs:61328): NullReferenceException: Object reference not set to an instance of an object. AdaptMeshToTerrain.Adapt () (at <00000000000000000000000000000000>:0) AdaptMeshToTerrain.OnEnable () (at <00000000000000000000000000000000>:0) GameManager.CreatePrefab (System.String strPrefab, System.Boolean active) (at <00000000000000000000000000000000>:0) PrefabPoolWarmup.PrefabWarmup (System.String path) (at <00000000000000000000000000000000>:0) PrefabPoolWarmup+<Run>d__1.MoveNext () (at <00000000000000000000000000000000>:0) UnityEngine.SetupCoroutine.InvokeMoveNext (System.Collections.IEnumerator enumerator, System.IntPtr returnValueAddress) (at <00000000000000000000000000000000>:0) GameManager:CreatePrefab(String, Boolean) PrefabPoolWarmup:PrefabWarmup(String) <Run>d__1:MoveNext() UnityEngine.SetupCoroutine:InvokeMoveNext(IEnumerator, IntPtr)"

Map is made by me. I got same problem with downloaded ready custom map. Procedural map generated by server works fine. Hosting is OVH with AMP. Anyone know whats wrong? Tried to ask at RustEdit discord but no clue yet. 

I've used a custom map before and it required an extra file called Oxide.Ext.RustEdit.dll added to RustDedicated_Data/Managed before it would work.