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I'm getting -- what I am sure is -- a silly error. I'm trying to run a simple flow on ECS. I get this. Any ideas about what the cause is?

Hey <@U01GBFZ4YSZ>,
With the information provided, it looks like you’re not able to pull the Prefect base image from Docker for your run configuration. This error seems to be Docker/ECS specific, so I’d start your debugging <https://docs.aws.amazon.com/AmazonECS/latest/developerguide/task_cannot_pull_image.html|here>.

Thanks! What's the best way to specify a certain vpc/subnet for the ecs agent? <@UUDFU628J>

Hmm, I believe this would configured for the <https://docs.aws.amazon.com/AmazonECS/latest/developerguide/service-configure-network.html|AWS instance> itself and not specified by the agent. The agent just needs <https://docs.prefect.io/orchestration/agents/ecs.html#aws-credentials|to be authenticated >to submit jobs, while the <https://docs.prefect.io/orchestration/flow_config/run_configs.html#ecsrun|flow’s run configuration> specifies the image for the agent to pull directly at runtime.