Error when trying to enroll for a benefit by an employee

Summary

The following error is getting when the employee try to enroll for a benefit. "The program or plan year enrollment period was not found for this compensation object."

Content

The following error is getting when the employee tries to enroll for a benefit. "The program or plan year enrollment period was not found for this compensation object.". I can not identify the cause. We hope to implement Benefits for the client. Can someone please help me to configure further?