Im getting this Warning: Creating default object from empty value in

Im getting below Warning: https://share-ask.com/wp-admin/post-new.php when i try 2 add new post

Warning : Creating default object from empty value in /home/shareask/public_html/wp-admin/includes/post.php on line 708

Warning : Invalid argument supplied for foreach() in /home/shareask/public_html/wp-content/plugins/wordpress-seo/admin/metabox/class-metabox.php on line 937