Source Control - Git : The current solution has projects that are located outside the solution folder

I have a web site project developed in Visual Studio 2010 where the solution file is Visual Studio 2010\Projects\Rascal\Rascal.sln and the website files and folders are under Visual Studio 2010\WebSites\Rascal\.  This is the way Visual Studio 2010 set it up.

I work on the project now in Visual Studio 2019.  I cannot source control the project using Git. I get the error:  The current solution has projects that are located outside the solution folder.These projects will not be source controlled in Git repository.To add all the projects to a single Git repository please consolidate all projects under a single folder. 

How do I deal with this?  I have tried moving Rascal.sln to the web site folder but this did not help.  I have also tried consolidating the files into the one directory a number of ways but still no luck.

Any help would be appreciated.   

Thanks...Alan