Hey guys, I'm on airflow 1.8.2 and have noticed that when I trigger a DAG with the small play button in the UI, I am sometimes unable to clear the tasks from within the Graph View. For example: I click on the task in the UI and in the pop-up menu that appears I select 'Clear' and finally, when I click on 'Ok' I am directed to the Error page (The feared 'Oops.' page).
However, if I create a DAG from the Admin menu and run it manually, I am able to clear the tasks. What's the difference between triggering with the play button and creating a manual DAG run in the Admin menu? And why can't I clear the tasks when I trigger it with the play button? Thanks in advance! - Ali
