SSO Integration>New UI>Chubb>University Health>Server error after waiving Lifetime Benefit Term plan

Env - Preprod
Company under test - University Health For HSPL

1] Login to the application as a employee.
2] Traverse OE/New Hire mode.
3] Navigate to Enroll Now>Lifetime Benefits Plan
4] Click on "Review Plan" button, employee gets redirected to Chubb SSO window.
5] Waive the plan from Chubb, after waiving it from TexasLife employee get redirected to
WorkTerra.
Actual Result:
Server error at WorkTerra side.
Expected Result:
Server error should not be displayed, plan should be get waived successfully.
Refer attached screenshot and error log for more details.
Please note we have not found any error log for this error.

Cc: Prasad Pise, Rakesh Roy