Sounds like the event didn't get the front money to all the artists agencies in time and without that, they weren't paying the fees for entertainer's visas or filing the applications. Since some of these are artists from several different major companies that are familiar with obtaining the visas it isn't like the mistake is on the companies' parts. Usually the visa should be applied for 45 days before the perfomance or there is an extra fee for a rush that makes the visa even more expensive. Plus at $4000 or more for a first class ticket no company in Korea is paying that themselves unless they got the deposit on the artists' appearance fee that covers travel, visas, the artists' entourage, etc. If this is a new festival they likely messed up, or their eyes were too big for their stomach and they booked more artists than they had the up front cash to pay for.

I feel bad for fans, this is way too sudden. As for Super junior, not all members managed to fly and if the rest catches later flight, Suju gonna perform without rehearsals, straight out of plane and probably with longer setlist. Not to mention to half-empty venue, since many fans of other groups just get refund. This is even harder than cancellation. 🤨