Error message

Hi

I get this error message with the Autoset Featured Image plugin, does nayone have any ideas? It has only just started.

Notice: Trying to get property of non-object in /var/sites/o/onefishermansloft.co.uk/public_html/wp-content/plugins/autoset-featured-image/autoset-featured-image.php on line 38

Notice: Trying to get property of non-object in /var/sites/o/onefishermansloft.co.uk/public_html/wp-content/plugins/autoset-featured-image/autoset-featured-image.php on line 40

Notice: Trying to get property of non-object in /var/sites/o/onefishermansloft.co.uk/public_html/wp-content/plugins/autoset-featured-image/autoset-featured-image.php on line 42

Notice: Trying to get property of non-object in /var/sites/o/onefishermansloft.co.uk/public_html/wp-content/plugins/autoset-featured-image/autoset-featured-image.php on line 45