I tried to create a job to call a REST API every 10 minutes using the Application Lab UI of the Workload Scheduler. The task works fine, if I push Run Now.
This is the configuration of my trigger:
I left out valid to intentionally to have this task running infinitely.
Looking the trigger you created seems to be right: your step will run every 10 minutes every days. If not, could you specify what is not working? Thanks