CHICAGO — A judge’s recent ruling that Gov. J.B. Pritzker’s COVID-19 mask mandate was authorized illegally prompted chaos and confusion Monday morning at school districts across Illinois, as increasingly volatile battles over virus mitigation strategies further divided communities and forced some schools to cancel classes. Meanwhile, the Illinois Attorney General’s office filed an appeal Monday, demanding a stay to Sangamon County Circuit Judge Raylene Grischow’s Friday decision to grant a request from downstate attorney Tom DeVore to temporarily roll back the governor’s executive orders on ma…