The error message below shows up when manually cancelling the execution of the workflow.
U0001156 The Workflow 'Workflow-Name (0002156003) has been cancelled' has been canceled by the user 'ACCESS/TEST'.
U0000009 'Job-Name': Access Denied
Component: CA Automic Workload Automation
Release : 12.x, 21.x
Permission issue
-Please check the Authorization of the AE user and make sure the user has an execution permission on the workflow as shown below.
-Also check if the AE user belongs to the Usergroup and if the UserGroup has a permission to execute.