Problem after last update

Hello, since the last update of the plugin I get this error, and the site only works. After disabling the plugin, the site works properly. How can this be fixed?

A apărut o eroare de tipul E_ERROR pe linia 490 a fișierului /sites/www.socializam.com/files/wp-content/plugins/seo-by-rank-math/includes/replace-variables/class-post-variables.php. Mesaj eroare: Uncaught Error: Call to undefined method MyThemeShop\Helpers\Arr::from_string() in /sites/www.socializam.com/files/wp-content/plugins/seo-by-rank-math/includes/replace-variables/class-post-variables.php:490 Stack trace: #0 /sites/www.socializam.com/files/wp-content/plugins/seo-by-rank-math/includes/replace-variables/class-post-variables.php(344): RankMath\Replace_Variables\Post_Variables->get_post_content() #1 /sites/www.socializam.com/files/wp-content/plugins/seo-by-rank-math/includes/replace-variables/class-post-variables.php(60): RankMath\Replace_Variables\Post_Variables->get_excerpt() #2 /sites/www.socializam.com/files/wp-content/plugins/seo-by-rank-math/includes/replace-variables/class-manager.php(175): RankMath\Replace_Variables\Post_Variables->setup_post_variables() #3 /sites/www.socializam.com/files/wp-includes/class-wp-hook.php(307): RankMath\Replace_Variables\Manager->setup() #4 /sites/www.socializam.com/files/wp-includes/class-wp-hook.php(331): WP_Hook->apply_filters() #5 /sites/www.socializam.com/