Alarms failed to execute action - Empty error message

Having issues with triggering scaling events, I've tried couple different ways to create the alarms and scaling policies, but none work. The "Received error" is empty, I'm guessing it's just hidden from me. How can I get help with this?

Failed to execute action arn:aws:autoscaling:us-west-2:784417831348:scalingPolicy:fab38292-1d9f-4659-82f7-64e8f72e1fbb:resource/ecs/service/development-cluster/development-service:policyName/AggregatorScaleOutPolicy. Received error: ""

I've used both cloudformation and the point and click interface to try to make the ECS Fargate cluster scale but always same result... I need help.