I have a fresh Monogame mgdesktopgl project, try to launch it or install a package via Rider — and get an error:
`/usr/lib/dotnet/sdk/6.0.116/NuGet.targets(130,5): error : The local source '/path/to/NUnit.3.13.3/NUnit.3.13.3.nupkg' doesn't exist. [/tmp/72ddfe2e-e24d-496e-ae34-4cfebefde81f/restore.csproj] [/anotherPath/to//testProj/testProj.csproj]
I have the nupkg in the required folder. This error also occurs after "dotnet restore" and "dotnet tool restore" commands with the following log:
Package "dotnet-mgcb" failed to restore, due to Microsoft.DotNet.ToolPackage.ToolPackageException: The tool package could not be restored. at Microsoft.DotNet.Tools.Tool.Install.ProjectRestorer.Restore(FilePath project, PackageLocation packageLocation, String verbosity) at Microsoft.DotNet.ToolPackage.ToolPackageInstaller.InstallPackageToExternalManagedLocation(PackageLocation packageLocation, PackageId packageId, VersionRange versionRange, String targetFramework, String verbosity) at Microsoft.DotNet.Tools.Tool.Restore.ToolRestoreCommand.InstallPackages(ToolManifestPackage package, Nullable 1 configFile) Package "dotnet-mgcb-editor-windows" failed to restore, due to Microsoft.DotNet.ToolPackage.ToolPackageException: The tool package could not be restored. at Microsoft.DotNet.Tools.Tool.Install.ProjectRestorer.Restore(FilePath project, PackageLocation packageLocation, String verbosity) at Microsoft.DotNet.ToolPackage.ToolPackageInstaller.InstallPackageToExternalManagedLocation(PackageLocation packageLocation, PackageId packageId, VersionRange versionRange, String targetFramework, String verbosity) at Microsoft.DotNet.Tools.Tool.Restore.ToolRestoreCommand.InstallPackages(ToolManifestPackage package, Nullable 1 configFile)
I've tried "dotnet add package NUnit", and "nuget install Nunit" in the required folder, reinstalled dotnet.
The issue was solved by writing dotnet new nugetconfig in console. It was found in https://www.programmingwithwolfgang.com/nuget-targets-local-source-does-not-exist/