Missing data ever since upgraded to new versions

I have several pages which been working fine until I recently upgraded versions of Wapper. I retrieve all upcoming bookings data and have a button which allows me to drill down into the detail of a particular record in a table. I also calculate balances for that record in several columns. With the upgrades, all of the calculated fields and the button to allow a drill down have stopped working. Can you please take a look and see why it is no longer working?

the page is:

https://www.marsalstudios.com/admin/upcoming_weddings.php

Thanks,
Rick