Meghan Markle and Prince Harry have suffered another staffing setback after the announcement that a senior advisor has left their role at Archewell. Christine Schirmer served as senior advisor for the royal couple’s nonprofit organisation which was founded in 2020. She joined the same year that it was set up, serving as communications director before transitioning to senior advisor in 2021. Schirmer, who will now work at the Brunswick Group – a public relations firm, is the latest staff member to step away from the Duke and Duchess of Sussex. The total number of staff the Sussexes have lost si…