Falha na instalação de pacote is4admin do identityserver4.templates

[ywb2150]

Prezados,
Bom dia!

Peço ajuda para instalação do pacote is4admin do identityserver4.templates não estou conseguindo há 3 dias com várias tentativas.

"\CursoIS4>dotnet new is4admin
Could not find the template package containing template 'IdentityServer4.Admin'
Could not find the template package containing template 'IdentityServer4.Admin'
Sequence contains more than one matching element
at System.Linq.ThrowHelper.ThrowMoreThanOneMatchException()
at System.Linq.Enumerable.TryGetSingle[TSource](IEnumerable1 source, Func2 predicate, Boolean& found)
at System.Linq.Enumerable.Single[TSource](IEnumerable1 source, Func2 predicate)
at Microsoft.TemplateEngine.Edge.Settings.TemplatePackageManager.GetTemplatePackageAsync(ITemplateInfo template, CancellationToken cancellationToken)
at Microsoft.TemplateEngine.Cli.CliTemplateInfo.GetManagedTemplatePackageAsync(TemplatePackageManager templatePackageManager, CancellationToken cancellationToken)
at Microsoft.TemplateEngine.Cli.TemplateInvoker.InvokeTemplateAsync(TemplateCommandArgs templateArgs, CancellationToken cancellationToken)
at Microsoft.TemplateEngine.Cli.Commands.TemplateCommand.InvokeAsync(ParseResult parseResult, CancellationToken cancellationToken)
at Microsoft.TemplateEngine.Cli.Commands.InstantiateCommand.HandleTemplateInstantiationAsync(InstantiateCommandArgs args, IEngineEnvironmentSettings environmentSettings, TemplatePackageManager templatePackageManager, TemplateGroup templateGroup, CancellationToken cancellationToken)
at Microsoft.TemplateEngine.Cli.Commands.InstantiateCommand.ExecuteIntAsync(InstantiateCommandArgs instantiateArgs, IEngineEnvironmentSettings environmentSettings, TemplatePackageManager templatePackageManager, ParseResult parseResult, CancellationToken cancellationToken)
at Microsoft.TemplateEngine.Cli.Commands.BaseCommand`1.CommandAction.InvokeAsync(ParseResult parseResult, CancellationToken cancellationToken)

For details on the exit code, refer to https://aka.ms/templating-exit-codes#70"

Abraços.
Braimo Paraja