@SravaniB5425

Here’s a quick fix list. 1) In your perform harness, re-enable client-side validation and HTML5 validation, then save-as with the Infinity 23 skin. 2) Replace old Group layouts with Dynamic layouts; Group/Tabbed from pre-8.8 often break client checks after upgrade. 3) On tab controls, turn off Defer load for tabs that contain required fields, or move required fields to always-loaded sections. 4) On each required control, use the latest OOTB control and set Required = Always/When with no custom JS; avoid disabled conditions that hide the required marker. 5) Clear rule/browser caches and regenerate static content (static res). 6) Update to the matching Theme-Cosmos/Constellation version and templates; avoid legacy UI-Kit sections. 7) Put a server-side Validate rule on the flow action as a safety net. 8) If errors still only show after submit, enable “Display errors on top” in the harness and remove any custom error handling scripts. 9) Retest with tracer disabled and no Live UI to ensure client code actually runs.