Hi Nikola, Thank you for trying EA on my site. I have tried everything that I know to solve the problem and nothing worked. So, I have uninstalled EA and deleted the entire page. Then, I have created a new page and reinstalled EA . Now everything works great. I don't have time slot error anymore. Also, booking an appointment takes a single time slot. You mentioned that my site is very slow. I am really new to this and I don't know how to speed it up. Any suggestions would be appreciated. Thank you for all your help.