Unable to Secure Long-Term Visa Appointment on VFS Global for Erasmus

I've been attempting to schedule a visa appointment for my Erasmus program through the VFS Global website, but unfortunately, I am unable to access the site during the designated application opening hours. I frequently encounter an error message that states, "An error has occurred, please attempt again." I've been searching for an appointment for my program since October, but I haven't had any luck so far. I would greatly appreciate your assistance in resolving this matter.