Mutation Report Publisher failed to load. No HTML report found.. | Azure Devops

[DokterICT]

Describe the bug
We get sometimes errors in Azure Devops using Stryker with the error message:
Mutation Report Publisher failed to load. No HTML report found..

When we run the pipeline 5 times, this happens 4 times. 1 of the 5 times, we get an Report shown up in DevOps,
There are no changes on the code
We implement an YAML pipeline with multiple reports.

Can you assist on those error(s)?
Correct Result:

Error:

Pipeline:

    - task: DotNetCoreCLI@2
      displayName: 'Install dotnet-stryker'
      inputs:
        command: custom
        custom: tool
        arguments: 'install dotnet-stryker --tool-path $(Agent.BuildDirectory)/tools'

    - task: PowerShell@2
      displayName: 'dotnet tool update dotnet-stryker'
      inputs:
        workingDirectory: '$(System.DefaultWorkingDirectory)\tests\'
        targetType: inline
        script: dotnet tool update dotnet-stryker

    - task: PowerShell@2
      displayName: 'Run dotnet-stryker for xxxxApi.Tests'
      inputs:
        workingDirectory: '$(System.DefaultWorkingDirectory)\tests\xxxxApi.Tests'
        targetType: inline
        script: dotnet stryker --config-file "../stryker-config.json"

    - task: PowerShell@2
      displayName: 'Run dotnet-stryker for xxx.Business.Tests'
      inputs:
        workingDirectory: '$(System.DefaultWorkingDirectory)\tests\xxx.Business.Tests'
        targetType: inline
        script: dotnet stryker --config-file "../stryker-config.json"

    - task: PowerShell@2
      displayName: 'Run dotnet-stryker for xxx.DataAccess.Tests'
      inputs:
        workingDirectory: '$(System.DefaultWorkingDirectory)\tests\xxxxxxxxx.Tests'
        targetType: inline
        script: dotnet stryker --config-file "../stryker-config.json" --mutate "**/*Repository.cs"

    - task: PublishMutationReport@1
      displayName: 'Publish Mutation Test Report'
      inputs:
        reportPattern: '**/mutation-report.html'

Config json file:

{
  "stryker-config": {
    "mutation-level": "Standard",
    "reporters": [ "html", "progress" ],
    "thresholds": {
      "high": 80,
      "low": 65,
      "break": 50
    }
  }
}

[rouke-broersma]

Could you share the logs of the Stryker run in the pipeline that show the report was generated?

[DokterICT]

[rouke-broersma]

Does the Publish Mutation Testing Report step show that files were found and that they were uploaded?

You can find logging for the mutation report tab in the javascript console. Could you post the relevant logs in the javascript console with the mutation testing report tab open on a pipeline where the report fails to load?

[DokterICT]

How do I login to the javascript console ? :)

[rouke-broersma]

F12 to open your browser's developer console, then go to the console tab.

[DokterICT]

Good morning Rouke, sorry for the late response, but I was on vacation.
Hereby the logging of the Console

[rouke-broersma]

The logging shows that no attachments were found for this specific pipeline, which is why not report is shown in the UI. Does the Publish Mutation Testing Report step show that files were found and that they were uploaded?

It should look like this:

[DokterICT]

That is correct:

[rouke-broersma]

And this screenshot is of a pipeline where you do not have the reports available? Or is his a screenshot of the step in a pipeline where you did have the reports?

[DokterICT]

This is a screenshot, where we don't have access to the Reports.

[rouke-broersma]

In that case I'm afraid I am out of ideas. The extension is not receiving the reports from the azure devops api so there's nothing to display. Sorry.