Unable to find package Microsoft.AspNetCore.Blazor.Templates

[zhandzlik]

I've been trying to run the command listed here to install the Blazor Web Assembly, but I continue to get the error mentioned in the subject. I've tried uninstalling .Net SDK 3.0.1 entirely and reinstalling, but I continue to get this error. Below is command and the error output from command line:

C:\Users\zhandzlik>dotnet new -I Microsoft.AspNetCore.Blazor.Templates::3.0.0-preview9.19465.2 
C:\Users\zhandzlik\.templateengine\dotnetcli\v3.0.100\scratch\restore.csproj : error NU1101: Unable to find package Microsoft.AspNetCore.Blazor.Templates. No packages exist with this id in source(s): C:\Program Files\dotnet\sdk\NuGetFallbackFolder, Microsoft Visual Studio Offline Packages
  Restore failed in 141.23 ms for C:\Users\zhandzlik\.templateengine\dotnetcli\v3.0.100\scratch\restore.csproj.

Usage: new [options]

Options:
  -h, --help          Displays help for this command.
  -l, --list          Lists templates containing the specified name. If no name is specified, lists all templates.
  -n, --name          The name for the output being created. If no name is specified, the name of the current directory is used.
  -o, --output        Location to place the generated output.
  -i, --install       Installs a source or a template pack.
  -u, --uninstall     Uninstalls a source or a template pack.
  --nuget-source      Specifies a NuGet source to use during install.
  --type              Filters templates based on available types. Predefined values are "project", "item" or "other".
  --dry-run           Displays a summary of what would happen if the given command line were run if it would result in a template creation.
  --force             Forces content to be generated even if it would change existing files.
  -lang, --language   Filters templates based on language and specifies the language of the template to create.
  --update-check      Check the currently installed template packs for updates.
  --update-apply      Check the currently installed template packs for update, and install the updates.

Templates                                         Short Name               Language          Tags                       
----------------------------------------------------------------------------------------------------------------------------------
Console Application                               console                  [C#], F#, VB      Common/Console             
Class library                                     classlib                 [C#], F#, VB      Common/Library             
WPF Application                                   wpf                      [C#]              Common/WPF                 
WPF Class library                                 wpflib                   [C#]              Common/WPF                 
WPF Custom Control Library                        wpfcustomcontrollib      [C#]              Common/WPF                 
WPF User Control Library                          wpfusercontrollib        [C#]              Common/WPF                 
Windows Forms (WinForms) Application              winforms                 [C#]              Common/WinForms            
Windows Forms (WinForms) Class library            winformslib              [C#]              Common/WinForms            
Worker Service                                    worker                   [C#]              Common/Worker/Web          
Unit Test Project                                 mstest                   [C#], F#, VB      Test/MSTest                
NUnit 3 Test Project                              nunit                    [C#], F#, VB      Test/NUnit                 
NUnit 3 Test Item                                 nunit-test               [C#], F#, VB      Test/NUnit                 
xUnit Test Project                                xunit                    [C#], F#, VB      Test/xUnit                 
Razor Component                                   razorcomponent           [C#]              Web/ASP.NET                
Razor Page                                        page                     [C#]              Web/ASP.NET                
MVC ViewImports                                   viewimports              [C#]              Web/ASP.NET                
MVC ViewStart                                     viewstart                [C#]              Web/ASP.NET                
Blazor Server App                                 blazorserver             [C#]              Web/Blazor                 
ASP.NET Core Empty                                web                      [C#], F#          Web/Empty                  
ASP.NET Core Web App (Model-View-Controller)      mvc                      [C#], F#          Web/MVC                    
ASP.NET Core Web App                              webapp                   [C#]              Web/MVC/Razor Pages        
ASP.NET Core with Angular                         angular                  [C#]              Web/MVC/SPA                
ASP.NET Core with React.js                        react                    [C#]              Web/MVC/SPA                
ASP.NET Core with React.js and Redux              reactredux               [C#]              Web/MVC/SPA                
Razor Class Library                               razorclasslib            [C#]              Web/Razor/Library/Razor Class Library
ASP.NET Core Web API                              webapi                   [C#], F#          Web/WebAPI                 
ASP.NET Core gRPC Service                         grpc                     [C#]              Web/gRPC                   
dotnet gitignore file                             gitignore                                  Config                     
global.json file                                  globaljson                                 Config                     
NuGet Config                                      nugetconfig                                Config                     
Dotnet local tool manifest file                   tool-manifest                              Config                     
Web Config                                        webconfig                                  Config                     
Solution File                                     sln                                        Solution                   
Protocol Buffer File                              proto                                      Web/gRPC                   

Examples:
    dotnet new mvc --auth Individual
    dotnet new webapi
    dotnet new --help

C:\Users\zhandzlik>dotnet new -i Microsoft.AspNetCore.Blazor.Templates::3.0.0-preview7.19365.7
C:\Users\zhandzlik\.templateengine\dotnetcli\v3.0.100\scratch\restore.csproj : error NU1101: Unable to find package Microsoft.AspNetCore.Blazor.Templates. No packages exist with this id in source(s): C:\Program Files\dotnet\sdk\NuGetFallbackFolder, Microsoft Visual Studio Offline Packages
  Restore failed in 136.81 ms for C:\Users\zhandzlik\.templateengine\dotnetcli\v3.0.100\scratch\restore.csproj.

[guardrex]

Search over on the dotnet/cli issues (both open and closed issues).

Check a few things, too ...

• Are you possibly being blocked by a firewall or proxy?
• Do you have a nuget.config file somewhere in the directory tree (or project) where you're issuing that command with a different NuGet package source?
• Try clearing the package cache ... dotnet nuget locals --clear all.