SSO>TexasLife>Internal Server error at TexasLife side, after clicking on "See Options" button

Env - Stage
Company under test - Symphony for HSPL

1] Login as a employee to the application.
2] While traversing New Hire flow, click on "Enroll" button for TexasLife plan.
3] Employee gets redirected to TexasLife Window.
4] Click on NEXT button on second page.
5] Click on "See Option" button on second page.

Actual Result:
An internal server error occurred and was logged.
Expected Result:
Error should not be display.
Refer attached screenshot and error log for more details.

Cc: Santosh Balid, Jaideep Vinchurkar, Prasad Pise, WT-Admin, Samir