Project Types Failing

We utilize Portfolio > Project Types via our theme Karuna > Karuna Child. Recently our site shows the error “There has been a critical error on this website.” when using the links to the project types. We reached out to support and they said,

“It appears the current error is generated by the current child theme, Karuna child. This is the error is displays in the logs:

PHP Fatal error:  Uncaught Error: Class “Jetpack_Portfolio” not found in /srv/htdocs/wp-content/themes/karuna-child/functions.php:42

Activating the parent theme or fixing the code in the existing one should help render the projects correctly once again.”

We looked at the parent theme’s functions.php file and did a search for “Jetpack_Porfolio” but had zero results. If reverting to the parent theme would resolve the issue, wouldn’t that be somewhere in the file? Even if it was, doesn’t the child theme look to the parent theme to get most of the content required to function, and then the child theme is mostly our personalization changes, if any?

Reverting to the parent theme would buckle our layout and result in days of project work for our team, which does not have an internal developer. Any assistance resolving this error is highly appreciated!

The page I need help with: [log in to see the link]