Why did Jessica ennis miss the 2008 Beijing Olympics?

Jessica Ennis missed the 2008 Beijing Olympics due to a serious injury she sustained in the lead-up to the Games. She suffered a stress fracture in her right foot, which prevented her from competing in the heptathlon. Despite her disappointment, she focused on recovery and returned to form, eventually achieving great success in subsequent competitions, including winning gold at the 2012 London Olympics.