After update site very slow host says its the theme problem

site: https://www.correiocapivari.com.br/

i updated the theme and the site is running really slow i opened an support on my host and they said its the theme going wrong and sent me this.

Erro de banco de dados do WordPress Lost connection to MySQL server during query para a consulta SELECT t.*, tt.* FROM wp_terms AS t INNER JOIN wp_term_taxonomy AS tt ON t.term_id = tt.term_id WHERE tt.taxonomy IN (‘nav_menu’) ORDER BY t.name ASC feita por require(‘wp-blog-header.php’), require_once(‘wp-load.php’), require_once(‘wp-config.php’), require_once(‘wp-settings.php’), include(‘/themes/Newspaper/functions.php’), require_once(‘/themes/Newspaper/includes/wp-booster/tagdiv-wp-booster-functions.php’), do_action(‘td_wp_booster_legacy’), WP_Hook->do_action, WP_Hook->apply_filters, {closure}, require_once(‘/plugins/td-composer/legacy/Newspaper/functions.php’), require_once(‘/plugins/td-composer/legacy/common/wp_booster/td_wp_booster_functions.php’), do_action(‘td_global_after’), WP_Hook->do_action, WP_Hook->apply_filters, td_config::on_td_global_after_config, wp_get_nav_menus, get_terms, WP_Term_Query->query, WP_Term_Query->get_terms