SSO Integration>New UI>TexasLife>Server error is displaying after waiving TexasLife plan from WorkTerra

Env - Codemap
Company under test - For QA-FDU-Azure

1] Login to the application as a employee.
2] Traverse OE/New Hire mode.
3] Navigate to Enroll Now>TexasLife plan. (Plan Name - Whole Life)
4] Click on "Enroll" button, employee gets redirected to TexasLife SSO window.
5] Waive plan from TexasLife, after waiving it from TexasLife employee get redirected to
WorkTerra and message displaying "Click on Waive button.."
6] Click on the Waive button.

Actual Result:
Server error is displaying.
Expected Result:
Server error should not be displayed, plan should be get waived successfully.

Refer attached screenshot and error log for more details.

Cc: Prasad Pise, Sachin Hingole, Rakesh Roy, Nidhi Kaul, Vijayendra Shinde