Visa interview appointments dates doesn't shows.

[gopikn]

When checked on the VFS site for the next interview dates, if prompt some message to check after 24 hours. For the past two weeks or so, it is showing the same message.
Is it beacuse the interview dates has all been blocked for a respective period. Or is that with some problem with the site ? One of my friend told me that, they are able to reschedule the interview date. Over there, they can see the calendar for available dates.

Please help !!