Hello,
Working on Apex approval component using single level approval. the tasks flow smoothly for the entire workflow except when I add a new potential owner using apex_approval.Add_potential_owner. when I query Apex_task_participants view,it shows the added potential owner, the admin and the actual owner usernames (all lowercase) as Im using SSO for authentication.

in the task details, using the following in the server-side conditon for the buttons Claim/Reject/approve buttons
apex_approval.is_of_participant_type(
p_task_id => :P13_task_ID,
p_participant_type => apex_approval.c_task_potential_owner,
p_user => :app_user
)
when the new added potential owner navigate to the page, the three buttons are rendered., but he/she clikcs on any button, the following pops up

and the same goes for reject and claim.
any help is appreciated. Thank you
Massara