Print function not working with new theme

We moved our website to a new theme and everything seems to be working except I get a redirect to the home page now when trying to print a recipe using the plugin print function.

See example at https://domainemadeleine.com/recipe/dungeness-crabcakes/

When you click the print icon in top right of the recipe, it is now rediecting to the home page.

Any ideas?

https://ww.wp.xz.cn/plugins/wp-ultimate-recipe/