Error when submitting elections for 2021 Open enrollment event for Non-exempt employees

Summary

I am receiving the below error when I try to submit my elections for 2021 OE for weekly employees. I do not have any issues when I try to submit elections for exempt (semi-monthly) employees.

Content

I am testing 2021 OE in our test environment and get the attached error when I submit elections as a weekly employee. The rate start date for weekly employees for 2021 is 12/28/2020. The per pay periods, coverage start date and rate start date are all showing correctly. I am able to close the event without any issues-- but unable to make any elections and submit due to this error. If any of you have come across this error before -- please share your insights or options. I have not seen this error before---- any help is appreciated. Thanks!