King Charles has suffered an embarrassing blow after a footballer rejected an invitation to meet the monarch during his upcoming visit to Australia. Craig Foster, who earned 29 caps for the Socceroos and is now a human rights campaigner, declined an invitation to attend a community BBQ in the presence of King Charles III and Queen Camilla. The ex-footballer took to social media to explain his decision, stating he would not attend such an event until Australia had its own elected head of state. Foster’s rejection comes as King Charles and Queen Camilla prepare for their “autumn tour” of Austral…