Fatal Error and can’t import Demo 5

Hello,

I have the following fatal error : Fatal error: Trait ‘Thim_EL_Kit\SingletonTrait’ not found in /home/www/vhosts/protour.fr/dev.protour.fr/wp-content/plugins/travel-booking/inc/external-plugin/elementor/TourElementor.php on line 8

Also i cannot import this demo : https://preview.themeforest.net/item/travelwp-traveltour-booking-wordpress-theme/full_screen_preview/19029758?_ga=2.192703018.1206028597.1707989116-1343901419.1707989116&_gac=1.250399604.1707989116.CjwKCAiAibeuBhAAEiwAiXBoJMH8KBljO819XtqoDinb0ffc7_du1VW-N1eR7NgCZQEtbsYF8t8pjRoCrowQAvD_BwE since it’s not showing up on the import part of the WordPress admin.

Thanks