This pipeline makes use of common templates which have been converted to support 1ES templates in https://github.com/dotnet/docker-tools/pull/1215. Because it's an internal pipeline it wants to use the 1ES.PublishPipelineArtifact task but the pipeline itself is not a 1ES pipeline. It was not in the original plans to migrate this pipeline but we'll probably have to, using the unofficial template.
A task is missing. The pipeline references a task called '1ES.PublishPipelineArtifact'. This usually indicates the task isn't installed, and you may be able to install it from the Marketplace: https://marketplace.visualstudio.com. (Task version 1, job 'Linux_amd64', step ''.)
This pipeline makes use of common templates which have been converted to support 1ES templates in https://github.com/dotnet/docker-tools/pull/1215. Because it's an internal pipeline it wants to use the 1ES.PublishPipelineArtifact task but the pipeline itself is not a 1ES pipeline. It was not in the original plans to migrate this pipeline but we'll probably have to, using the unofficial template.