Unable to load the service index for source azure devops

While creating Nuget package through Azure DevOps pipeline and adding the package to the Artifacts, you might get the following or similar errors:

error NU1301: Unable to load the service index for source https://xxxx.dev.azure.com/MyApps/_packaging/MyPackage%40Local/nuget/v3/index.json

This could usually happen when you’re Publishing the package to Nuget in a separate job or Stage from the Build step.

To resolve this, you need to do a nuget package restore before publishing the package to Nuget:

steps:
  - task: DotNetCoreCLI@2
    displayName: Nuget package restore
    inputs:
      command: restore
      projects: '$(workingDirectory)/**/$(projectName)*.csproj'
      feedsToUse: 'config'
      nugetConfigPath: $(workingDirectory)/nuget.config
  - task: DotNetCoreCLI@2
    displayName: Create Nuget Package
    inputs:
        command: pack
        versioningScheme: byBuildNumber
        arguments: '--configuration $(buildConfiguration)'
        packagesToPack: '$(workingDirectory)/**/$(projectName).csproj'
        packDestination: '$(Build.ArtifactStagingDirectory)'
  - task: NuGetAuthenticate@0
    displayName: 'NuGet Authenticate'
  - task: NuGetCommand@2
    displayName: 'NuGet push'
    inputs:
      command: push
      publishVstsFeed: 'MyFramework'
      allowPackageConflicts: true

The variables in the above template can be passed from a Pipeline that is triggered by a change to a branch or run manually.