Thank you for taking the time to report this issue to the Community, although I apologize that you have not yet received a response.
If you are still needing assistance with the CC-502 error with Credit Union of Texas. Please take a moment and review the steps and information available here.
If the trouble persists after completing these steps, please contact support directly for advanced troubleshooting steps and a review of the logs and for possible escalation.
It looks like you're new here. If you want to get involved, click one of these buttons!