Hi Yevhen - sensors run on your grpc server container so this error makes me think that that container may not have access to the same Docker environment as dagit. Fixing that could involve adding the docker socket as a volume to that container like this: https://github.com/dagster-io/dagster/blob/master/examples/deploy_docker/docker-compose.yml#L61

Yep, now it works! Thank you, @daniel!