这是我在从 Dotner CLI 安装任何类型的包时遇到的错误。有什么方法可以解决这个问题吗？非常感谢所有解决方案！
dotnet tool install --global dotnet-ef
Unhandled exception: Microsoft.DotNet.Cli.NuGetPackageDownloader.NuGetPackageInstallerException: Package Source Mapping is enabled, but no source found under the specified package ID: dotnet-ef. See the documentation for Package Source Mapping at https://aka.ms/nuget-package-source-mapping for more details.
at Microsoft.DotNet.Cli.NuGetPackageDownloader.NuGetPackageDownloader.LoadNuGetSources(PackageId packageId, PackageSourceLocation packageSourceLocation, PackageSourceMapping packageSourceMapping)
at Microsoft.DotNet.Cli.NuGetPackageDownloader.NuGetPackageDownloader.GetBestPackageVersionAsync(PackageId packageId, VersionRange versionRange, PackageSourceLocation packageSourceLocation)
at Microsoft.DotNet.Cli.ToolPackage.ToolPackageDownloader.<>c__DisplayClass8_0.<InstallPackage>b__0()
at Microsoft.DotNet.Cli.TransactionalAction.Run[T](Func`1 action, Action commit, Action rollback)
at Microsoft.DotNet.Tools.Tool.Install.ToolInstallGlobalOrToolPathCommand.Execute()
at System.CommandLine.Invocation.InvocationPipeline.Invoke(ParseResult parseResult)
at Microsoft.DotNet.Cli.Program.ProcessArgs(String[] args, TimeSpan startupTime, ITelemetry telemetryClient)
我试过 ：
dotnet nuget locals all --clear
dotnet nuget add source https://api.nuget.org/v3/index.json --name nuget.org
但这些似乎都不起作用。