Gallery not displaying in com_Contacts (using Trombinoscope Pro)

 My current setup:
Joomla! 3.10.3
Trombinoscope Contacts Pro 4.7.1
Showtime Image Gallery 1.5.3 (https://www.firecoders.com/joomla-extensions/showtime-image-gallery)
The Problem:
I cannot get my Showtime Image galleries to show up properly on my Trombinoscope Contacts pages. The custom field is appearing on the page, but only shows the field Title and ID number of the gallery (https://www.creede.com/2022-business-listings/biz/creede-repertory-theatre)

What I've done:

I have the following set up:
1. I have created the Showtime Gallery Field in Contacts
2. In Trombinoscope Contacts Pro Global Options: "Shared Options" --> In "Custom Fields" I have "Showtime Image Gallery" selected.
3. In Trombinoscope Contacts Pro Global Options: "Fields" --> In "Other Fields" I have "Showtime" selected.
4. I have created a file (but made NO edits other than changing the file name) "/html/layouts/com_trombinoscopeextended/details/tcp_detail_jfield_showtime.php" in template "js_alasse"
5. I created a Menu Item: Trombinoscope Contacts Pro » Trombinoscope (grid) (https://www.creede.com/2022-business-listings/biz/creede-repertory-theatre)

How can I get my gallery to display as part of Trombinoscope?