Hi Webman,
I am getting similar to above. With Multiple bookings it does not take me to the page to create the booking, jsut refreshes and goes back to the bookings overview. Works fine with the individual bookings. If it helps, Im using Server 2019, IIS 10, MySql 5.5 and php version 7.4.5
With single bookings, it makes the booking but I have to refresh.
Happy to send screen shots of anything that might help.
All the best