@[deleted]Even if I wanted to, I can not delete the modifications made. The point is that this is associated with the fact that when you try to send the notification mails for the user who has the assigned task as the participants, the problem occurs, do the following:Comment the lines of code from 483 - 501 in the file task-view.tmpl.phpand in this way I do not see the recipients option even though the participants are added to the task, of course, in case you do not want to, they send a notification to the mail when this process is done.See detail in attached images