The user is seeing the error "Missing start rules" while trying to configure playbook in Process Automation designer.Issue Generating a sequence via the UI action in the Service Catalog’s Order Guide Sequencing plugin results in a "Missing start rule" error when using Playbook plugin version 28.2.1, but not in version 28.0.8. Release Playbook 28.2.1 Cause The root cause lies in Order Guide sequencing failing to set the required start_rule_name field introduced in PAD schema version 2 (v28.1), leading to validation failures in the PAD renderer. Resolution PRB1972924 is targeted to be fixed in the Brazil release. To workaround the issue, run the script below in the background script for the affected playbook: var sppd = new GlideRecord('sys_pd_process_definition'); sppd.get(''); // add the process sys id sppd.setWorkflow(false); sppd.schema_version = 2; sppd.update(); Now the playbook can be activated and executed.