Hi thanks for your reply!
I tried that also but it didn’t hide it (and no, I don’t have any cache plugin on this server) it just throws the following on the error log:
[05-Feb-2014 09:39:03 UTC] WordPress database error Table 'arieljer_dtex.arl_19_options' doesn't exist for query SELECT option_value FROM arl_19_options WHERE option_name = 'arl_19_user_roles' LIMIT 1 made by require('wp-blog-header.php'), require_once('wp-includes/template-loader.php'), include('/themes/ariel/page-events-of-the-year.php'), the_content, apply_filters('the_content'), call_user_func_array, do_shortcode, preg_replace_callback, do_shortcode_tag, call_user_func, em_get_events_list_shortcode, em_locate_template, include('/plugins/events-manager/templates/templates/events-list.php'), EM_Events::output, EM_Events::get, em_get_event, EM_Event->__construct, get_blog_post, switch_to_blog, WP_Roles->reinit, get_option
[05-Feb-2014 09:39:03 UTC] WordPress database error Table 'arieljer_dtex.arl_19_posts' doesn't exist for query SELECT * FROM arl_19_posts WHERE ID = 9 LIMIT 1 made by require('wp-blog-header.php'), require_once('wp-includes/template-loader.php'), include('/themes/ariel/page-events-of-the-year.php'), the_content, apply_filters('the_content'), call_user_func_array, do_shortcode, preg_replace_callback, do_shortcode_tag, call_user_func, em_get_events_list_shortcode, em_locate_template, include('/plugins/events-manager/templates/templates/events-list.php'), EM_Events::output, EM_Events::get, em_get_event, EM_Event->__construct, get_blog_post, get_post, WP_Post::get_instance
[05-Feb-2014 09:39:03 UTC] WordPress database error Table 'arieljer_dtex.arl_3_options' doesn't exist for query SELECT option_value FROM arl_3_options WHERE option_name = 'arl_3_user_roles' LIMIT 1 made by require('wp-blog-header.php'), require_once('wp-includes/template-loader.php'), include('/themes/ariel/page-events-of-the-year.php'), the_content, apply_filters('the_content'), call_user_func_array, do_shortcode, preg_replace_callback, do_shortcode_tag, call_user_func, em_get_events_list_shortcode, em_locate_template, include('/plugins/events-manager/templates/templates/events-list.php'), EM_Events::output, EM_Event->output, EM_Event->get_permalink, get_blog_permalink, switch_to_blog, WP_Roles->reinit, get_option
[05-Feb-2014 09:39:03 UTC] WordPress database error Table 'arieljer_dtex.arl_3_posts' doesn't exist for query SELECT * FROM arl_3_posts WHERE ID = 8 LIMIT 1 made by require('wp-blog-header.php'), require_once('wp-includes/template-loader.php'), include('/themes/ariel/page-events-of-the-year.php'), the_content, apply_filters('the_content'), call_user_func_array, do_shortcode, preg_replace_callback, do_shortcode_tag, call_user_func, em_get_events_list_shortcode, em_locate_template, include('/plugins/events-manager/templates/templates/events-list.php'), EM_Events::output, EM_Event->output, EM_Event->get_permalink, get_blog_permalink, get_permalink, get_page_link, get_post, WP_Post::get_instance
[05-Feb-2014 09:39:03 UTC] WordPress database error Table 'arieljer_dtex.arl_3_options' doesn't exist for query SELECT option_value FROM arl_3_options WHERE option_name = 'show_on_front' LIMIT 1 made by require('wp-blog-header.php'), require_once('wp-includes/template-loader.php'), include('/themes/ariel/page-events-of-the-year.php'), the_content, apply_filters('the_content'), call_user_func_array, do_shortcode, preg_replace_callback, do_shortcode_tag, call_user_func, em_get_events_list_shortcode, em_locate_template, include('/plugins/events-manager/templates/templates/events-list.php'), EM_Events::output, EM_Event->output, EM_Event->get_permalink, get_blog_permalink, get_permalink, get_page_link, get_option
[05-Feb-2014 09:39:03 UTC] WordPress database error Table 'arieljer_dtex.arl_3_options' doesn't exist for query SELECT option_value FROM arl_3_options WHERE option_name = 'home' LIMIT 1 made by require('wp-blog-header.php'), require_once('wp-includes/template-loader.php'), include('/themes/ariel/page-events-of-the-year.php'), the_content, apply_filters('the_content'), call_user_func_array, do_shortcode, preg_replace_callback, do_shortcode_tag, call_user_func, em_get_events_list_shortcode, em_locate_template, include('/plugins/events-manager/templates/templates/events-list.php'), EM_Events::output, EM_Event->output, EM_Event->get_permalink, get_blog_permalink, get_permalink, get_page_link, _get_page_link, home_url, get_home_url, get_option