Hello ! On my current project, as well as on a new project, Visual Studio takes forever to load a project using packages (any packages). I'm talking around 6 minutes for a new project. Once it's done loading, the output is filled with similar errors : [Failure] Could not find file 'D:\projects\New Unity Project\Packages\com.unity.textmeshpro\Scripts\Editor\TMPro_SDFMaterialEditor.cs'. [...] [Failure] Could not find file 'D:\projects\New Unity Project\Packages\com.unity.package-manager-ui\Editor\Sources\UI\PackageList.cs'. (In this particular case, 129 similar errors appear) And the files, indeed, don't exist in the project folder, as they are located in a common place (which I think is one of the point of packages),and aren't loaded in the solution. Unity, however, is able to compile correctly. For now, the only solution I've found is to copy the package contents in the corresponding path. This happens on multiple machines, all running Windows 10.