I have this problem.

Warning: strpos() expects parameter 1 to be string, object given in /home/faizalia/public_html/wp-includes/post.php on line 277

Warning: preg_match() expects parameter 2 to be string, object given in /home/faizalia/public_html/wp-includes/post.php on line 277

Catchable fatal error: Object of class WP_Error could not be converted to string in /home/faizalia/public_html/wp-includes/post.php on line 278

Line 277 :

if ( $file && 0 !== strpos( $file, '/' ) && ! preg_match( '|^.:\\\|', $file ) && ( ( $uploads = wp_get_upload_dir() ) && false === $uploads['error'] ) ) {

Line 278:

$file = $uploads['basedir'] . "/$file";

Any solutions?