Cannot see accept reject button for concept/proposal approval

Summary:

We have created Concepts and Proposals and submitted it for approval. Later we added the approver in the list and sent the proposal for approval. However, approver are not able to see Approve/Reject button in notification.

Content (please ensure you mask any confidential information):

Version (include the version you are using, if applicable):

Code Snippet (add any code snippets that support your topic, if applicable):