Precisely and concisely, My client has set an OOTB workflow on a document library and one of the users e.g. (User1) is unable to approve documents even though I granted that particular user (User1) Full Control and put the account inside the "Approvers" user group.
Currently, The user is getting an email in the Outlook stating: Task update was not accepted.
Also, I would like to mention that there has been no any changes for the user's account in the AD.
So, Could you please help me out to resolve this issue ?
I would greatly appreciate your inputs !