Blank Pages

Hi,

I have a site that suddenly appear blank pages on all my pages, except for my homepage thats feeds from the posts, I check already the steps for repairing the problem, add more MB on memory limit, clear cache, update themes and plugins, even I try to repair the database and this error appear

“wp_mediameta: Table ‘xxxxxxxDB.wp_mediameta’ doesn’t exist”

on the log has a lot of warnings for users that doesn’t exist

warn] [client 212.59.241.10] mod_fcgid: stderr: WordPress database error You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'WHERE active = 0 AND user_login = 'floyigfjzccccr' ORDER BY signup_id DESC LIMIT' at line 1 for query SELECT * FROM WHERE active = 0 AND user_login = 'floyigfjzccccr' ORDER BY signup_id DESC LIMIT 0, 1 made by require('wp-load.php'), require_once('wp-config.php'), require_once('wp-settings.php'), do_action('init'), call_user_func_array, kpg_ss_init, kpg_ss_check_white, be_load, kpg_ss_check_white->process, be_load, chkadminlog->process, wp_authenticate, apply_filters('authenticate'), call_user_func_array, bp_core_signup_disable_inactive, BP_Signup::get, referer: http://promocave.com/wp-login.php

I try to look for this users but they don’t exist on my table, and when you go to the site and you’re not login, the name of this user appears like if you’re log in with the fake user info.

Anyone had the same o similar problem? (I already check with my hosting provider is something is wrong and for his end everything seems fine.

Thanks for your help
Enrique