Release 'Publish Build Artifacts' fails with 'Unable to find container for build'

Hi, I am trying to publish some test results from the release agent working folder using the task 'Publish Build Artifacts' that I put into my release definition, but it fails with:

[error]Unable to find container for build: 88

I think 88 is the id of the build that triggered the release.

Interestingly, I have another 'Publish Build Artifacts' in my build definition and that works just fine.

Here is the task setup from my release definition

And this is all the log output of the task: Set workingFolder to default: C:\LR\MMS\Services\Mms\TaskAgentProvisioner\Tools\agents\1.99.0\tasks\PublishBuildArtifacts\1.0.30

[debug]loading inputs and endpoints

[debug]loading ENDPOINT_AUTH_SYSTEMVSSCONNECTION

[debug]loading INPUT_ARTIFACTNAME

[debug]loading INPUT_ARTIFACTTYPE

[debug]loading INPUT_PATHTOPUBLISH

[debug]loading INPUT_TARGETPATH

[debug]loaded 5

[debug]check path : C:\LR\MMS\Services\Mms\TaskAgentProvisioner\Tools\agents\1.99.0\tasks\PublishBuildArtifacts\1.0.30\task.json

[debug]set resource file to: C:\LR\MMS\Services\Mms\TaskAgentProvisioner\Tools\agents\1.99.0\tasks\PublishBuildArtifacts\1.0.30\task.json

[debug]system.culture=en-US

[debug]PathtoPublish=C:\a\1196b1921\requirementsCoverage.html

[debug]check path : C:\a\1196b1921\requirementsCoverage.html

[debug]ArtifactName=ReqirementCoverage

[debug]ArtifactType=Container

[debug]TargetPath=\my\share\waverage.feature\waverage_plan_in_traderwebapp_2016_05_18.5

[error]Unable to find container for build: 88

Could you help me find out what the problem is?

Or in case this task is not supported in a release definition, is there a way around this? Something like using cUrl or powershell to attach the files to the release using the VSO Rest API?

microsoft / vso-agent