Mesh publish errors for Microsoft.MixedReality.WebView.WebViewLifetimeManager

Hello, thanks for letting us know. For now, you can remove the WebViewSystem from your scene. This GameObject is created with HideFlags.HideInHierarchy so that's why you can't see it on the scene hierarchy on your inspector. You can follow your mentioned steps, or you can enable Auto-filter components under "Project Settings > Mesh Uploader Settings". Note that Auto-filter will remove any non-supported components and you will be able to still see warnings when this filter does remove one before building.