The Opéra de Dijon has announced a conductor change for its production of Haydn’s “L’Isola disabitata.” The company informed audience members that Leonardo García Alarcón has been forced to cancel after testing positive for COVID-19 and will quarantine. As a result, Fayçal Karoui will replace Alarcón in rehearsals and for the performances on Nov. 27 and 28, 2021. Karoui is a {…}