One of the moderators of this very forum is a female, as well as many other talented contributors to linux. Unless where you come from 'sir' describes both sexes you might consider changing that
Onto the show...
What do you mean "panel" What panel has gone missing? WWhat distro are you running? What were you doing when it disappeared?
Thanks for including all that and any extra info you may find that you think could help us
Welcome to LQ,