Lost Database Connection

Hello,
my website had a down today. I had a look on the error log and I’ve found this:

[Mon Jun 20 07:45:07 2016] [error] WordPress errore sul database Lost connection to MySQL server during query per la query SHOW TABLES LIKE ‘wp_ceceppa_ml’ fatta da require_once(‘wp-load.php’), require_once(‘wp-config.php’), require_once(‘wp-settings.php’), include_once(‘/plugins/ceceppa-multilingua/ceceppaml.php’)

After that, I had a look at the previous lines of the error log and I’ve found the following:

[Mon Jun 13 08:33:29 2016] [error] WordPress database error Unknown column ‘cml_cat_description’ in ‘field list’ for query SELECT id, cml_cat_id, UNHEX(cml_cat_name) as original, UNHEX(cml_cat_translation) as name, UNHEX(cml_cat_translation_slug) as slug, cml_taxonomy, UNHEX(cml_cat_description) as description FROM wp_ceceppa_ml_cats WHERE cml_cat_id = 54 AND cml_cat_lang_id = 3 made by require(‘wp-blog-header.php’), require_once(‘wp-includes/template-loader.php’), include(‘/themes/theme48164/page-home.php’), get_footer, locate_template, load_template, require_once(‘/themes/CherryFramework/footer.php’), get_template_part, locate_template, load_template, require(‘/themes/theme48164/wrapper/wrapper-footer.php’), dynamic_sidebar, call_user_func_array, WP_Widget->display_callback, WP_Nav_Menu_Widget->widget, wp_nav_menu, wp_get_nav_menu_items, array_map, wp_setup_nav_menu_item, get_term_field, get_term, apply_filters(‘get_term’), call_user_func_array, CMLFrontend->translate_term, CMLFrontend->translate_terms, CeceppaML->get_translated_term, CMLTaxonomies::get

Any idea on the origin of the problem?
Thank you
Antonio

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