1. Does button "Test" sends email or file to FTP?
If you see empty reply, mark checkbox "Enable debug output" in section "Misc Settings" and press button "Test" again.
2. Visit list of jobs and check if columns "Last run" and "Next run" show correct time
If you haven't added WP cron to system cron - follow this article
3. Set frequent schedule for the job ( for example, each minute) .
Mark checkbox "Enable debug output" in section "Misc Settings" and press "Save Settings".Visit tab "Settings"> "Jobs" , click on the url and review output.
If you see "All jobs completed" - wait 1 min and refresh the page
4. Edit job , mark checkbox "Log results" (in section "Schedule"), save job and wait till job run.
Open job again , click link "View Logs"(next to checkbox) and select "woocommerce-order-export-...." in dropdown.