Azure-Getting server error on Enroll now page while traversing Classwise OE mode

Employee credentials:
User name: hspl9909
password: Password@3
Company name: GBAPS For HSPL

steps:
1.Traverse employee workflow.(Classwise OE mode)
2.Completed workflow.
3.Go to employee dashboard.
4.Click on change open enrollment election
5.Traverse workflow and go to enroll now page

Please refer attached screen shot and error log

Actual result: Getting server error
Expected result:Enroll now page should be get open