How to make second approver accessible to requisition from "My Staff Tasks"?

Summary:

When I tried to access to a requisition from "My Staff Tasks" with a second approver, the following error occurred.

How to make it accessible to the requisition from "My Staff Tasks"?

The procedure is as follows:

1) Go to "My Staff Tasks" from approval page and open a requisition.

2) Click on a hyperlink of the requisition, and then the error occurred and couldn't open the requisition.