Invalid action on workflow task or user does not have privilege to perform this action (Approve Pur

Summary

Invalid action on workflow task or user does not have privilege to perform this action (Approve Purchase document)

Content

Hi.

Good morning.

I'm having an error on approve some purchase documents.

"Invalid action on workflow task or user does not have privilege to perform
 this action. Action APPROVE on task da3a58bc-08dc-4f08-9501-8f712bdfee7b
 cannot be performed by andre.panzeri. Make sure that the action is valid with
 respect to the current state of the task or ensure that the user has privilege
 to perform this action on the workflow task"

I saw the purchase document and it was already approved but the notification was still in the user's worklist. When he tried to approve for the second time the error occurred.