W3 Total Cache Error

The error is caused by /wp-content/plugins/cta/classes/class.cta.variations.php on line 38

Try to dibable “cta” plugin

I’m having a similar issues with a client site…
Due to the following message, neither my client or I are able to login to the wordpress dashboard area, which means updates to the site and its blog are currently not available to us.

This is the error message I get:

W3 Total Cache Error: some files appear to be missing or out of place. Please re-install plugin or remove %s.
‘, __FILE__ ); } } else { require_once W3TC_DIR . ‘/w3-total-cache-api.php’; $w3tc_redirect = \W3TC\Dispatcher::component( ‘Mobile_Redirect’ ); $w3tc_redirect->process(); $w3tc_config = \W3TC\Dispatcher::config(); if ( $w3tc_config->get_boolean( ‘pgcache.enabled’ ) ) { $o = \W3TC\Dispatcher::component( ‘PgCache_ContentGrabber’ ); $o->process(); } } }

Warning: Cannot modify header information – headers already sent by (output started at /public_html/clientsite.co.uk/wp-content/advanced-cache.php:19) in /public_html/clientsite.co.uk/wp-login.php on line 394

Warning: Cannot modify header information – headers already sent by (output started at /public_html/clientsite.co.uk/wp-content/advanced-cache.php:19) in /public_html/client.co.uk/wp-login.php on line 407

I have double checked that the login-php is clean by checking it against a pristine copy of the login.php from wordpress.

I am sure that my problem is with the advanced-cache.php… this is what line 19 says… can someone help me fix it?

define( ‘W3TC_DIR’, ( defined( ‘WP_PLUGIN_DIR’ ) ? WP_PLUGIN_DIR : WP_CONTENT_DIR . ‘/plugins’ ) . ‘/w3-total-cache’ );

Thank in advance to anyone that can help.