I am having a similar problem. I recently upgraded and added a few plugins. Then I started getting this error at the top of every page:
Warning: main(/home/sites/citruslabel.com/public_html/wp-content/plugins/entrecard-admanager/) [function.main]: failed to open stream: Success in /home/sites/citruslabel.com/public_html/wp-settings.php on line 473
Warning: main() [function.include]: Failed opening ‘/home/sites/citruslabel.com/public_html/wp-content/plugins/entrecard-admanager/’ for inclusion (include_path=’.:/usr/share/pear’) in /home/sites/citruslabel.com/public_html/wp-settings.php on line 473
Warning: session_start() [function.session-start]: Cannot send session cookie – headers already sent by (output started at /home/sites/citruslabel.com/public_html/wp-settings.php:473) in /home/sites/citruslabel.com/public_html/wp-content/plugins/wp-e-commerce/wp-shopping-cart.php on line 166
Warning: session_start() [function.session-start]: Cannot send session cache limiter – headers already sent (output started at /home/sites/citruslabel.com/public_html/wp-settings.php:473) in /home/sites/citruslabel.com/public_html/wp-content/plugins/wp-e-commerce/wp-shopping-cart.php on line 166
But unlike the rest of you clever guys I don’t have a clue about fixing it. I cannot access the admin page to make any changes. And I don’t understand what you guys mean by backing up etc as I do not have anything to do with wordpress on my hard drive….
Can anyone help… please!