[PROBLEM] the game doesn't start.

[SashaRomanov]

I'm getting this error

UnassignedReferenceException: The variable meshRenderer of UnitModel has not been assigned.
You probably need to assign the meshRenderer variable of the UnitModel script in the inspector.
UnityEngine.Renderer.get_sharedMaterials () (at /home/builduser/buildslave/unity/build/Runtime/Export/Graphics/GraphicsRenderers.bindings.cs:145)
Client.UnitModel.CreateTransparentMaterials () (at Assets/Scripts/Client/Rendering/Unit Renderer/Unit Model/UnitModel.cs:186)
Client.UnitModel.ToggleTransparentMode (System.Boolean apply, System.Single currentAlpha, System.Single targetAlpha) (at Assets/Scripts/Client/Rendering/Unit Renderer/Unit Model/UnitModel.cs:146)
Client.UnitModel.Initialize (Client.UnitModelInitializer initializer) (at Assets/Scripts/Client/Rendering/Unit Renderer/Unit Model/UnitModel.cs:58)
Client.UnitRenderer.ReplaceModel (System.Int32 modelId, Client.UnitModelReplacementMode mode) (at Assets/Scripts/Client/Rendering/Unit Renderer/UnitRenderer.cs:139)
Client.UnitRenderer.Attach (Core.Unit unit) (at Assets/Scripts/Client/Rendering/Unit Renderer/UnitRenderer.cs:29)
Client.RenderingReference+UnitRendererController.AttachRenderer (Core.Unit unit) (at Assets/Scripts/Client/Rendering/Unit Renderer/UnitRendererController.cs:121)
Client.RenderingReference+UnitRendererController.OnServerVisibilityChanged (Core.WorldEntity worldEntity, System.Boolean visible) (at Assets/Scripts/Client/Rendering/Unit Renderer/UnitRendererController.cs:167)
Common.EventHandler.ExecuteEvent[T1,T2] (System.Object target, Common.GameEvents gameGameEvent, T1 arg1, T2 arg2) (at Assets/Scripts/Common/Common/EventHandler.cs:223)
Core.Player+VisibilityController.SetScopeOf (Core.WorldEntity target, System.Boolean inScope) (at Assets/Scripts/Core/Entity/Player/Controllers/Player.VisibilityController.cs:47)
Core.Player+VisibilityController.UpdateVisibilityOf (Core.WorldEntity target) (at Assets/Scripts/Core/Entity/Player/Controllers/Player.VisibilityController.cs:77)
Core.MapGrid+PlayerVisibilityNotifier.HandleUnitVisibility (Core.Unit target) (at Assets/Scripts/Core/World/Grid/MapGrid.PlayerVisibilityNotifier.cs:39)
Core.MapGrid+PlayerVisibilityNotifier.Core.IUnitVisitor.Visit (Core.Player player) (at Assets/Scripts/Core/World/Grid/MapGrid.PlayerVisibilityNotifier.cs:45)
Core.Player.Accept (Core.IUnitVisitor visitor) (at Assets/Scripts/Core/Entity/Player/Player.cs:144)
Core.MapGrid+Cell.Visit (Core.IUnitVisitor unitVisitor) (at Assets/Scripts/Core/World/Grid/MapGrid.Cell.cs:80)
Core.MapGrid.VisitInRadius (Core.WorldEntity referer, System.Single radius, Core.IUnitVisitor unitVisitor) (at Assets/Scripts/Core/World/Grid/MapGrid.Base.cs:158)
Core.MapGrid.UpdateVisibility (Core.Player player, System.Boolean forceUpdateOthers) (at Assets/Scripts/Core/World/Grid/MapGrid.Base.cs:129)
Core.MapGrid+CellRelocator.Core.IUnitVisitor.Visit (Core.Player player) (at Assets/Scripts/Core/World/Grid/MapGrid.CellRelocator.cs:46)
Core.Player.Accept (Core.IUnitVisitor visitor) (at Assets/Scripts/Core/Entity/Player/Player.cs:144)
Core.MapGrid+Cell.Visit (Core.IUnitVisitor unitVisitor) (at Assets/Scripts/Core/World/Grid/MapGrid.Cell.cs:80)
Core.MapGrid.DoUpdate (System.Int32 deltaTime) (at Assets/Scripts/Core/World/Grid/MapGrid.Base.cs:75)
Core.Map.DoUpdate (System.Int32 deltaTime) (at Assets/Scripts/Core/Map/Map.cs:51)
Core.MapManager.DoUpdate (System.Int32 timeDiff) (at Assets/Scripts/Core/Map/MapManager.cs:45)
Core.World.DoUpdate (System.Int32 deltaTime) (at Assets/Scripts/Core/World/World.cs:40)
Server.WorldServer.DoUpdate (System.Int32 deltaTime) (at Assets/Scripts/Server/Multiplayer/WorldServer.cs:45)
Game.GameManager.Update () (at Assets/Scripts/Workflow/GameManager.cs:56)

when i start single or create server, am i missing something here ?

[Reinisch]

It looks like one of the models is missing mesh renderer reference. Check model prefabs at Prefabs/Unit/Models, maybe you tried copying new model?

[Reinisch]

Probably Mage or Druid Cat prefab