I have to uninstall and reinstall every time I try to use it or it won't work. I finally got an appointment set up for my covid booster vaccine, I received the confirmation email with a link to complete my request, the link takes me to the app which tells me I have no upcoming appointments. I'll probably cancel and go to CVS since I know their app works, was trying to go to Walgreens since it's closer by whatever. Oh wait, I can't cancel because the app says I don't have an appointment.