Yes, the command syntax is correct. After running these commands, your ECS Task block should be properly registered and available for use. If you continue to see the error after following these steps, please let me know and we can investigate further. It would be helpful to know: 1. Did you previously have

prefect-aws

installed and working? 2. Have you made any recent changes to your Python environment or dependencies? 3. Are you running this in a container or on a local machine?

Based on the recent GitHub issues and your context, I can see a few potential issues at play. Let me break down the debugging steps based on what's most likely causing your specific error: 1. Most Likely Cause: Block Registration Issue in Container The error

KeyError: "No class found for dispatch key 'ecs-task' in registry for type 'Block'."

suggests that the ECS Task block registration was lost or failed in your container. This can happen if: - The container was restarted and block registration didn't persist - The

prefect-aws

package was somehow unloaded or corrupted - There's an issue with the container's Python environment 2. Immediate Fix: Inside your container, run:

bash
   # First verify the package is still installed
   pip list | grep prefect-aws
   
   # Then re-register the blocks
   prefect block register -m prefect_aws

3. Container Persistence Solution: To prevent this from happening again, you should: - Add the block registration command to your container's startup script or entrypoint - Or add it to your Dockerfile:

dockerfile
   RUN pip install prefect-aws && prefect block register -m prefect_aws

4. Version Check: There have been some recent issues with ECS tasks in containers. Please verify your versions:

bash
   prefect version
   pip show prefect-aws

Make sure you're using compatible versions of Prefect and prefect-aws. Would you be able to: 1. Check if

prefect-aws

is still installed in the container? 2. Try re-registering the blocks and let me know if the error persists? 3. Share your Prefect and prefect-aws versions? Also, based on the GitHub issues I found, there are some known issues with ECS tasks in certain scenarios. If the above steps don't resolve your issue, we might need to look at your specific ECS task configuration and how the container is being managed.