NU1301: Unable to load the service index for source, even after setting up Personal Access Token

Recently my Net7 build pipeline started failing with the error

NU1301: Unable to load the service index for source https://pkgs.dev.azure.com/<mypartner>/<guid>/_packaging/mypackagename/nuget/v3/index.json

I can open the index.json in the browser in a round about manner.In that on navigating to the .json Microsoft asks me to login again.I then get a 404 error

This pkgs.dev.azure.com page cant be found
No web page was found forthe web address
https://pkgs.dev.azure.com/_public/_MsalSignedIn
HTTP ERROR 404

If I then refresh I do see the .json

My Yaml is

pool:  vmImage: 'windows-latest'variables:  solution: '**/*.sln'  buildPlatform: 'Any CPU'  buildConfiguration: 'Debug'  ValidAuthenticationTypes_trackCommon: 'negotiate,ntlm'steps:- task: NuGetAuthenticate@1  inputs:    nuGetServiceConnections: 'trackCommon'    forceReinstallCredentialProvider: true- task: NuGetToolInstaller@1  inputs:    versionSpec: '>=6.1'    checkLatest: false- task: UseDotNet@2  inputs:    packageType: 'sdk'    version: '7.x'    includePreviewVersions: true- script: |    echo "##vso[task.setvariable variable=PAV_NUGET_AUTH_TOKEN]$(PAV_NUGET_AUTH_TOKEN)"  displayName: 'Set NuGet Auth Token'- task: DotNetCoreCLI@2  inputs:    command: 'restore'    feedsToUse: 'config'    nugetConfigPath: 'ApiFortrack/nuget.config'    externalFeedCredentials: 'trackCommon'

The error occurs on the last task DotNetCoreCLI@2

I tried adding a Personal Access Token to the mypartner organization as per Zimmergren.net but it has not helped.

I use the same email address to login to the devops organisation that my pipeline is in and the mypartner organization. I wonder if it is relevant that I have to authenticate each time I switch between these organisations.

Update

After reading this similar question I tried replacing the problem task with

- task: NuGetCommand@2  inputs:    command: 'restore'    restoreSolution: '$(solution)'    feedsToUse: 'config'    nugetConfigPath: 'ApiFortrack/nuget.config'    externalFeedCredentials: 'trackCommon'

However the pipeline does not complete this task. After 25 minutes I cancelled and am now trying a re-run.

The log says

C:\hostedtoolcache\windows\NuGet\6.11.0\x64\nuget.exe restore D:\a\1\s\ApiFortrack3.sln -Verbosity Detailed -NonInteractive -ConfigFile D:\a\1\s\ApiFortrack\nuget.config

UpdateI was able to get the pipeline running by updating the PAT in the trackCommon service connection.

Now I am wondering whether adding the PAT in a variable is redundant.Also I am wondering if moving the mypartner organisation to be in the same Entre Id Tenant as my source project would remove the need for a PAT. I gather it would save the constant need to authenticate as I switch between organisations.