Currently, there is a bug with VIP servers where it does not display the player max when there is at least one player in the VIP server. Currently, it says “{numberOfPlayers} of players max” when it should say "{numberOfPlayers} of {maxPlayerCount} players max.
Are you sure, was anyone actually in it? I was able to reproduce this when there was at least one player playing, otherwise it shows 0 of {maxPlayers}.
This bug can only be reproduced when you have at least one player in the VIP server. However, it is possible that this bug may be occurring only on certain browsers too.