Can not access wp-admin

Hi,

I have a wordpress site, and I can no longer access my dashboard. Whenever I login, I am redirected to the frontpage. No erros or anything, the site is up and running, but I just cant get to the wp-admin area.

I believe the problem started after my hosting provider performed a server maitenance, but they say there is nothing wrong on their side.

I have tried clearing cookies and cache, even tried to login from a diferent computer; deactivating all plugins; deleting .htaccess file; updating site URL on wp-config.php; uploading a fresh wp-login.php; deactivating my current theme.

I noticed several lines like this on the error_log inside the wp-admin folder:
[18-Feb-2017 16:54:08 UTC] WordPress database error Table ‘ricardom_wp89.wp_usermeta’ doesn’t exist for query SELECT user_id, meta_key, meta_value FROM wp_usermeta WHERE user_id IN (1) ORDER BY umeta_id ASC made by require_once(‘wp-load.php’), require_once(‘wp-config.php’), require_once(‘wp-settings.php’), do_action(‘plugins_loaded’), WP_Hook->do_action, WP_Hook->apply_filters, call_user_func_array, crp_lang_init, load_plugin_textdomain, get_user_locale, wp_get_current_user, _wp_get_current_user, apply_filters(‘determine_current_user’), WP_Hook->apply_filters, call_user_func_array, wp_validate_auth_cookie, get_user_by, WP_User->init, WP_User->for_blog, WP_User->_init_caps, get_user_meta, get_metadata, update_meta_cache
[18-Feb-2017 16:54:13 UTC] WordPress database error Table ‘ricardom_wp89.wp_usermeta’ doesn’t exist for query SELECT user_id, meta_key, meta_value FROM wp_usermeta WHERE user_id IN (1) ORDER BY umeta_id ASC made by require_once(‘wp-admin/admin.php’), require_once(‘wp-load.php’), require_once(‘wp-config.php’), require_once(‘wp-settings.php’), do_action(‘plugins_loaded’), WP_Hook->do_action, WP_Hook->apply_filters, call_user_func_array, crp_lang_init, load_plugin_textdomain, get_user_locale, wp_get_current_user, _wp_get_current_user, apply_filters(‘determine_current_user’), WP_Hook->apply_filters, call_user_func_array, wp_validate_auth_cookie, get_user_by, WP_User->init, WP_User->for_blog, WP_User->_init_caps, get_user_meta, get_metadata, update_meta_cache
[18-Feb-2017 17:08:02 UTC] WordPress database error Table ‘ricardom_wp89.wp_usermeta’ doesn’t exist for query SELECT user_id, meta_key, meta_value FROM wp_usermeta WHERE user_id IN (1) ORDER BY umeta_id ASC made by require_once(‘wp-load.php’), require_once(‘wp-config.php’), require_once(‘wp-settings.php’), do_action(‘plugins_loaded’), WP_Hook->do_action, WP_Hook->apply_filters, call_user_func_array, crp_lang_init, load_plugin_textdomain, get_user_locale, wp_get_current_user, _wp_get_current_user, apply_filters(‘determine_current_user’), WP_Hook->apply_filters, call_user_func_array, wp_validate_auth_cookie, get_user_by, WP_User->init, WP_User->for_blog, WP_User->_init_caps, get_user_meta, get_metadata, update_meta_cache

Not sure how to solve the problem.

Thanks