1. Yesterday my project worked normaly, this morning at unity startup I have messages in the console :

Can't find an asmdef for project: Unity.ugui; Unity actually allows this, so proceeding.
UnityEngine.Debug:Log(Object)
Microsoft.Build.Unity.ProjectGeneration.UnityProjectInfo:GetProjectInfo(Dictionary`2, Dictionary`2, HashSet`1, String) (at Library/PackageCache/com.microsoft.msbuildforunity@0.8.3/Editor/ProjectGenerator/Scripts/UnityProjectInfo.cs:255)
Microsoft.Build.Unity.ProjectGeneration.UnityProjectInfo:GetProjectInfo(Dictionary`2, Dictionary`2, HashSet`1, String) (at Library/PackageCache/com.microsoft.msbuildforunity@0.8.3/Editor/ProjectGenerator/Scripts/UnityProjectInfo.cs:288)
Microsoft.Build.Unity.ProjectGeneration.UnityProjectInfo:GetProjectInfo(Dictionary`2, Dictionary`2, HashSet`1, String) (at Library/PackageCache/com.microsoft.msbuildforunity@0.8.3/Editor/ProjectGenerator/Scripts/UnityProjectInfo.cs:288)
Microsoft.Build.Unity.ProjectGeneration.UnityProjectInfo:GetProjectInfo(Dictionary`2, Dictionary`2, HashSet`1, String) (at Library/PackageCache/com.microsoft.msbuildforunity@0.8.3/Editor/ProjectGenerator/Scripts/UnityProjectInfo.cs:288)
Microsoft.Build.Unity.ProjectGeneration.UnityProjectInfo:CreateUnityProjects() (at Library/PackageCache/com.microsoft.msbuildforunity@0.8.3/Editor/ProjectGenerator/Scripts/UnityProjectInfo.cs:199)
Microsoft.Build.Unity.ProjectGeneration.UnityProjectInfo:RefreshProjects() (at Library/PackageCache/com.microsoft.msbuildforunity@0.8.3/Editor/ProjectGenerator/Scripts/UnityProjectInfo.cs:104)
Microsoft.Build.Unity.ProjectGeneration.UnityProjectInfo:RefreshPlugins() (at Library/PackageCache/com.microsoft.msbuildforunity@0.8.3/Editor/ProjectGenerator/Scripts/UnityProjectInfo.cs:99)
Microsoft.Build.Unity.ProjectGeneration.UnityProjectInfo:.ctor(HashSet`1) (at Library/PackageCache/com.microsoft.msbuildforunity@0.8.3/Editor/ProjectGenerator/Scripts/UnityProjectInfo.cs:75)
Microsoft.Build.Unity.ProjectGeneration.MSBuildTools:get_UnityProjectInfo() (at Library/PackageCache/com.microsoft.msbuildforunity@0.8.3/Editor/ProjectGenerator/Scripts/MSBuildTools.cs:89)
Microsoft.Build.Unity.ProjectGeneration.MSBuildTools:RefreshGeneratedOutput(Boolean) (at Library/PackageCache/com.microsoft.msbuildforunity@0.8.3/Editor/ProjectGenerator/Scripts/MSBuildTools.cs:187)
Microsoft.Build.Unity.ProjectGeneration.<>c:<.cctor>g__OnUpdate|18_0() (at Library/PackageCache/com.microsoft.msbuildforunity@0.8.3/Editor/ProjectGenerator/Scripts/MSBuildTools.cs:149)
UnityEditor.EditorApplication:Internal_CallUpdateFunctions()

When launching I have warnings in the console :

Near clipping plane is < 0.1f. This may cause hologram instability when using Windows Mixed Reality.
UnityEngine.GUIUtility:ProcessEvent(Int32, IntPtr)

My camera near clipping plane was set to 0.1, I set it to 0.15 to be sure but still have the message.
And the left eye and right images are rendered as if the distance between eyes was of sevetal meters.

2. For me the bug is there any ways.