Merge pull request #1663 from xwp/fix/1662-fatal-error-unknown-format…

…-specifier

Fatal Error Unknown Format Specifier

connectors/class-connector-wordpress-seo.php

@@ -407,15 +407,18 @@ private function meta( $object_id, $meta_key, $meta_value ) {
 		}
 
 		$post            = get_post( $object_id );
-		$post_type_label = get_post_type_labels( get_post_type_object( $post->post_type ) )->singular_name;
+		$post_type_obj   = get_post_type_object( $post->post_type );
+		$post_type_label = is_object( $post_type_obj ) && isset( $post_type_obj->labels->singular_name )
+			? $post_type_obj->labels->singular_name
+			: $post->post_type;
 
 		$this->log(
 			sprintf(
 				/* translators: %1$s: a meta field title, %2$s: a post title, %3$s: a post type (e.g. "Description", "Hello World", "Post") */
 				__( 'Updated "%1$s" of "%2$s" %3$s', 'stream' ),
-				$this->escape_percentages( $field['title'] ),
-				$this->escape_percentages( $post->post_title ),
-				$this->escape_percentages( $post_type_label )
+				$this->escape_percentages( (string) $field['title'] ),
+				$this->escape_percentages( (string) $post->post_title ),
+				$this->escape_percentages( (string) $post_type_label )
 			),
 			array(
 				'meta_key'   => $meta_key,