Esay Appointments Plugins

Hi,

I am using the Easy Appointments https://ww.wp.xz.cn/plugins/easy-appointments/ plugin on my clients website. When I go to the page where I have added the shortcode and select a date for an appointment, there is always a text box “Please Select Another Day” which doesn’t disappear. Kindly help to fix this issue.

URL – http://kerrsocialmedia.ng.tn/contact/

Thanks in advance