Hi Goreti Imperial — thanks for flagging this. To help us narrow it down, can you share a bit more detail: what exactly happens when you try to book (you get an error message or it just won't let you finish)? Does it happen to you with any available schedule or only with certain days/times? And finally, are you trying to book yourself or is someone else (customer/follower) trying to book you? If it's easier, you can also email us at [email protected] with a screenshot of the error.