I have a Joomla 3.9.19 site at https://dev.mission-bbq.com that is using Tabs GK5 (mod_tabs_gk5).
It has recently stopped functioning. No JS errors are seen in the browser console.
The module's name is "Tabbed Sliders". It's simply set up to display separate image slideshow modules in a tabbed fashion.
(I also already have the JQuery Easy plugin installed on the site in case that helps.)