Always check if the user in question actually has the ability to patrol at all !
Do so using the ListUser-check
Please mark as patrolled
Thank you for helping fight vandalism on Commons. Just a reminder, don't forget to mark the bad edit you undid as patrolled (see also COM:EDITPATROL). Doing so will remove the edit from the unpatrolled edits list and reduce our backlog, and thus prevents double work. See also Commons:Counter Vandalism Unit. Thanks again, ~~~~