Error loading a nuget package in power shell.

Question

Hi, I'm trying to load the Azure.DigitalTwins.Core -Version 1.4.0 package in azure cloud shell (power shell) and I'm getting the following error. 
How can I solve it?


PS /home/p82salul/LocalFunctionProj> dotnet add package Microsoft.Azure.DigitalTwins.Core --version 1.4.0                                          Determining projects to restore...
  Writing /tmp/tmps90Rbs.tmp
info : X.509 certificate chain validation will use the fallback certificate bundle at '/usr/share/dotnet/sdk/6.0.408/trustedroots/codesignctl.pem'.
info : Adding PackageReference for package 'Microsoft.Azure.DigitalTwins.Core' into project '/home/p82salul/LocalFunctionProj/LocalFunctionProj.csproj'.
info : Restoring packages for /home/p82salul/LocalFunctionProj/LocalFunctionProj.csproj...
info :   GET https://api.nuget.org/v3-flatcontainer/microsoft.azure.digitaltwins.core/index.json
info :   GET https://www.nuget.org/packages/Azure.DigitalTwins.Core/FindPackagesById()?id='Microsoft.Azure.DigitalTwins.Core'&semVerLevel=2.0.0
info :   NotFound https://api.nuget.org/v3-flatcontainer/microsoft.azure.digitaltwins.core/index.json 377ms
info :   NotFound https://www.nuget.org/packages/Azure.DigitalTwins.Core/FindPackagesById()?id='Microsoft.Azure.DigitalTwins.Core'&semVerLevel=2.0.0 469ms
log  : Retrying 'FindPackagesByIdAsyncCore' for source 'https://www.nuget.org/packages/Azure.DigitalTwins.Core/FindPackagesById()?id='Microsoft.Azure.DigitalTwins.Core'&semVerLevel=2.0.0'.
log  : Response status code does not indicate success: 404 (Not Found).
info :   GET https://www.nuget.org/packages/Azure.DigitalTwins.Core/FindPackagesById()?id='Microsoft.Azure.DigitalTwins.Core'&semVerLevel=2.0.0
info :   NotFound https://www.nuget.org/packages/Azure.DigitalTwins.Core/FindPackagesById()?id='Microsoft.Azure.DigitalTwins.Core'&semVerLevel=2.0.0 40ms
log  : Retrying 'FindPackagesByIdAsyncCore' for source 'https://www.nuget.org/packages/Azure.DigitalTwins.Core/FindPackagesById()?id='Microsoft.Azure.DigitalTwins.Core'&semVerLevel=2.0.0'.
log  : Response status code does not indicate success: 404 (Not Found).
info :   GET https://www.nuget.org/packages/Azure.DigitalTwins.Core/FindPackagesById()?id='Microsoft.Azure.DigitalTwins.Core'&semVerLevel=2.0.0
info :   NotFound https://www.nuget.org/packages/Azure.DigitalTwins.Core/FindPackagesById()?id='Microsoft.Azure.DigitalTwins.Core'&semVerLevel=2.0.0 37ms
error: NU1301: Failed to retrieve information about 'Microsoft.Azure.DigitalTwins.Core' from remote source 'https://www.nuget.org/packages/Azure.DigitalTwins.Core/FindPackagesById()?id='Microsoft.Azure.DigitalTwins.Core'&semVerLevel=2.0.0'.
info : Package 'Microsoft.Azure.DigitalTwins.Core' is compatible with all the specified frameworks in project '/home/p82salul/LocalFunctionProj/LocalFunctionProj.csproj'.
error: Value cannot be null. (Parameter 'version')


Usage: NuGet.CommandLine.XPlat.dll package add [options]

Options:
  -h|--help               Show help information
  --force-english-output  Forces the application to run using an invariant, English-based culture.
  --package               Id of the package to be added.
  --version               Version of the package to be added.
  -d|--dg-file            Path to the dependency graph file to be used to restore preview and compatibility check.
  -p|--project            Path to the project file.
  -f|--framework          Frameworks for which the package reference should be added.
  -n|--no-restore         Do not perform restore preview and compatibility check. The added package reference will be unconditional.
  -s|--source             Specifies NuGet package sources to use during the restore.
  --package-directory     Directory to restore packages in.
  --interactive           Allow the command to block and require manual action for operations like authentication.
  --prerelease            Allows prerelease packages to be installed.

Answer 1

Is the version of .NET Core on your machine one of the versions supported by the package?

"dotnet --version" will show you the information.

Otherwise it's time to use that "contact owner" link.

You might also try asking the question over on https://stackoverflow.com

Answer 2

The error says that the URL leads to a non-existent page (404 (Not Found)) -- and both URLs result in the same error.

However, from the NuGet site (https://www.nuget.org/packages/Azure.DigitalTwins.Core) you can download the package. You should be able to install it from the downloaded file.

Have you logged on to the NuGet site and used the "Contact owners" link?

Answer 3

I downloaded the package from the link you gave me. But when I put the command it still gets the link to the page that does not exist.