In a surprising shake-up just before their South American trip, the Duke and Duchess of Sussex have lost another key member of their inner circle, with a top staffer quitting his role. After just three months on the job, Josh Kettler has reportedly stepped down as the Chief of Staff for Prince Harry and Meghan Markle. According to a report by The Guardian, both parties mutually agreed that the role wasn’t the right fit. Kettler’s departure is part of a series of staff changes within the couple’s team in recent years. In January 2023, Bennett Levine, who managed Meghan and Harry’s Archewell Pro…