Some pages just started not working. Instead it shows this message:
"Warning: preg_match() expects parameter 2 to be string, object given in /home/buraot/naujan.com/wp-includes/post-template.php on line 199
Catchable fatal error: Object of class WP_Post could not be converted to string in /home/buraot/naujan.com/wp-includes/post-template.php on line 217"
I had deleted the extra menu already and deactivated the plugins. Stiil, the same thing. Please help!