In Post Add Showing Warning

When activating In Post Ads Plugin in WP 4.5 and 4.6 it shows following messages:

Strict Standards: Redefining already defined constructor for class Wdca_AdminPages in /home/medictando/public_html/wp-content/plugins/custom-ads/lib/class_wdca_admin_pages.php on line 9

Strict Standards: Non-static method Wdca_AdminPages::serve() should not be called statically in /home/medictando/public_html/wp-content/plugins/custom-ads/custom-ads.php on line 76

What should i do?