As per the discussion in the Azure DevOps dedicated forum, the issue is supposed to be caused by the deprecated win2016. Any vs2017-win2016 runs will fail during the brownout period. Please check the official doc for more details.
If the issue still persists, please feel free to post on this ongoing thread for this particular issue.
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Azure DevOps is currently not supported on Microsoft Q&A. The Azure DevOps team and community are active and answering questions on https://developercommunity.visualstudio.com/spaces/21/index.html
You can also ask for help here on Stack Overflow: https://stackoverflow.com/questions/tagged/azure-devops
Please post your question on the forums shared above and the experts will guide you.