How To Fix WZ344 - You cannot complete work item &1 for user &2

SAP Error Message - Details

• Message type: E = Error

• Message class: WZ - Workflow: Model objects

• Message number: 344

• Message text: You cannot complete work item &1 for user &2

What causes this issue?

You tried to complete work item <(>&<)>1 for user <(>&<)>2, but you do
not have authorization for authorization object S_WF_WI (WI_TYPE = 'W',
TASK_CLASS = <(><<)>task class of the task underlying the work item>,
WFACTVT = '13').

System Response

The system prevents the completion.

How to fix this error?

Please obtain the required authorization from your workflow system
administrator.

Error message extract from SAP system. Copyright SAP SE.