Hello, I keep having this issue and I don't know how to solve it. Yesterday I noticed it, since yesterday I got my website to go live. There is an error that keeps popping up whatever I choose - " You can't select this time slot!' ". There are no other appointments made, so the calendar is free. All the services I offer appear and the time slots change based on each service's duration. This pop up shows up for each slot chosen, for every service, on whatever chosen day. And because of this, the appointment cannot be created. I tried from my phone, my PC and my laptop as well. Other people tried it from their end as well - same result: whatever service, day, time slot is chosen, the same error appears. Please help! I really like this plug in and I want it to work!