RSSP - Setting up preferences for the Approver with Edit Access

Approver with Edit Access will have "Edit Requisition" Link on the notification.

But when user clicks on the link, he is advised to fill in the preferences details. However, approver is not able to able to fill in any details under preferences. In short, he is not allowed to update the preferences.

The approver has the necessary data access in place. He has not been assigned the Preparer role, as he does not create requisitions but is expected to review and edit them during the approval process.

Could you please confirm if there's anything missing, Specifically, do I need to assign any additional privileges or duty roles to enable the approver to navigate across multiple Business Units and edit requisitions during approval?