I recently updated a simple 2-page website using the VB.Net version of Microsoft's ASP.NET Web Application template and then upgraded it to use Bootstrap 4 instead of Bootstrap 3, plus other changes. Earlier today, I exported a template from this project to help me to update other sites in a similar manner. However, the first new project I created using my custom template is giving me the following error.
This project references NuGet package(s) that are missing on this computer. UseNuGet Package Restore to download them. For more information, see http://go.microsoft.com/fwlink/?LinkID=322105. The missing file is packages\Microsoft.CodeDom.Providers.DotNetCompilerPlatform.2.0.1\build\net46\Microsoft.CodeDom.Providers.DotNetCompilerPlatform.props.
I used the NuGet Package Manager in VS 2019 to update the Microsoft.CodeDom.Providers.DotNetCompilerPlatform to the latest level, but that didn't fix the problem. I then tried the suggestion to use NuGet Package Restore, but this also had no effect. For reasons I don't understand, the bin\roslyn folder is empty. Perhaps that has some bearing on my problem, but I have failed to find a way to fix that.
Any guidance would be much appreciated.