It's a problem in Korea.
I've been looking at the exam center schedule since May 2021.
However, there are no empty slots in June and July 2021.
During the same period, 3V0-21.20 has an empty slot.
However, there is no 3V0-22.21.
Where should I contact to solve this problem?
PS : 3V0-51.20 is also not applicable.
From your screenshot, what happens when you select these days on the June calendar? (8, 9, 10, 12, 15, 17, 18, 19, 22, 23 and 30)?
These dates are not greyed out and should show time slots underneath the calendar. Check out the circled part in the screenshot below.