To register the MicroEnforcer which is deployed in AWS Fargate, you need a different approach.   

Push the MicroEnforcer image to your preferred and configured registry which is integrated in Aqua.  Afterwards, scan the image in Aqua. 

Once the MicroEnforcer image is scanned, the image assessment results are displayed 

 

 

 

Once the MicroEnforcer task is deployed in Fargate, the MicroEnforcer will be recognized and listed as a registered image.  There is no need to click on Workloads to try and register the MicroEnforcer task.