Navmesh and Buildprofile warnings everytime I launch Unity 6.0000.25f1

Every time I open Unity 6 with a blank project or my work project i receive these 3 Navmesh menu warnings, and then a build profile warning. Anyone know a fix for these or have these been reported as bugs already?

Cannot add menu item ‘GameObject/AI/NavMesh Surface’ for method ‘UnityEditor.AI.NavMeshSurfaceEditor.CreateNavMeshSurface’ because a menu item with the same name already exists.

Failed to load build profile from Library/BuildProfiles/PlatformProfile…

It looks like the “Digger” Asset Package was or is using the already existing menu points and causes this warnings.

I’m not using the Digger asset, never heard of it.

Is it a completely empty, new project? If not would you please be able to share it with me so I can see where is the problem?

I have confirmed that the same issue occurs in the project I am developing.

Cannot add menu item ‘GameObject/AI/NavMesh Surface’ for method ‘UnityEditor.AI.NavMeshSurfaceEditor.CreateNavMeshSurface’ because a menu item with the same name already exists.
UnityEditor.MenuService:GetMenuItemsFromAttributes ()

Cannot add menu item ‘GameObject/AI/NavMesh Link’ for method ‘UnityEditor.AI.NavMeshLinkEditor.CreateNavMeshLink’ because a menu item with the same name already exists.
UnityEditor.MenuService:GetMenuItemsFromAttributes ()

Cannot add menu item ‘GameObject/AI/NavMesh Modifier Volume’ for method ‘UnityEditor.AI.NavMeshModifierVolumeEditor.CreateNavMeshModifierVolume’ because a menu item with the same name already exists.
UnityEditor.MenuService:GetMenuItemsFromAttributes ()

The Unity version is 6000.3.0f1.
The AINAvigation version is 2.0.9.
Creating a completely new project with the same Unity version does not reproduce the issue.