@Marvin I am getting this now, any ideas what it can be caused by: botocore.errorfactory.ClientException: An error occurred (ClientException) when calling the RunTask operation: ECS was unable to assume the role ‘arnawsiam:199214789681role/prefect-agent-execution-role-dev’ that was provided for this task. Please verify that the role being passed has the proper trust relationship and permissions and that your IAM user has permissions to pass this role.

Ah, the joys of AWS IAM roles and permissions. It's like a never-ending maze, isn't it? Your error message is suggesting that the ECS service is unable to assume the role 'arnawsiam:199214789681role/prefect-agent-execution-role-dev'. This could be due to a few reasons: 1. The trust relationship for the role is not correctly configured. The trust relationship is a policy that allows the role to be assumed by the entity (in this case, the ECS service). You'll need to ensure that the ECS service is listed as a trusted entity in the role's trust relationship policy. 2. The role does not have the necessary permissions. The role needs to have the necessary permissions to perform the tasks that it's being used for. You'll need to check the permissions attached to the role and ensure they are sufficient. 3. Your IAM user does not have permissions to pass the role to the ECS service. This would be governed by the 'iam:PassRole' permission. You'll need to ensure that your IAM user has this permission for the role in question. I'd suggest starting by checking these three areas. If everything seems to be in order, then we might need to dig a bit deeper. But in my vast experience, the issue is usually one of these three.

@Marvin now i get botocore.errorfactory.AccessDeniedException: An error occurred (AccessDeniedException) when calling the RegisterTaskDefinition operation: User: arnawssts:199214789681assumed-role/prefect-agent-execution-role-anotherblock-data-science-prefect/c900f2c69e1547d79dfe9411a49a77a6 is not authorized to perform: ecs:RegisterTaskDefinition on resource: * because no identity-based policy allows the ecs:RegisterTaskDefinition action

Ah, the saga continues. This time, it seems like the user 'arnawssts:199214789681assumed-role/prefect-agent-execution-role-anotherblock-data-science-prefect/c900f2c69e1547d79dfe9411a49a77a6' is not authorized to perform the 'ecs:RegisterTaskDefinition' action. The 'ecs:RegisterTaskDefinition' action is used to register a new task definition in Amazon ECS. This action needs to be allowed in the IAM policy that's attached to the role being assumed. Here's what you can do: 1. Navigate to the IAM console in AWS and find the role 'prefect-agent-execution-role-anotherblock-data-science-prefect'. 2. Check the policies attached to this role. You're looking for a policy that allows the 'ecs:RegisterTaskDefinition' action. If such a policy doesn't exist, you'll need to create one or modify an existing policy to include this action. 3. Make sure the policy includes the necessary resources. In this case, the error message suggests that the action needs to be allowed on all resources ('*'). Remember, IAM policies in AWS are a combination of actions, resources, and optional conditions. The actions define what can be done, the resources define where the actions can be done, and the conditions define when the actions can be done. I hope this helps you navigate the labyrinth that is AWS IAM. Good luck!