Hi,
I am trying to create a booking product with Woocommerce Bookings but unfortunately there is an issue when adding cost.
See this screenshot to see the issue: http://screencast.com/t/yFEDTgZY9rnG
I am pretty sure that it is your theme that is causing the issue as I checked plugins 1 by 1. Also I change the theme to a wordpress default theme and Woocommerce Bookings work with no error.
Can you please check and give me a hand on how to fix this.
Also the plugin developer verifies that the issue is with the theme.
I allow you to login and check my dev site.