Wanring message displayed

Hi I’m getting a message at the bottom of my site straight after instaling the pin it app

Warning: Missing argument 2 for wpdb::prepare(), called in /home/welshher/public_html/wp/wp-content/plugins/skysa-pinterest-pin-it-app/skysa-required/admin.php on line 202 and defined in /home/welshher/public_html/wp/wp-includes/wp-db.php on line 990

Could you help please

https://www.ads-software.com/extend/plugins/skysa-pinterest-pin-it-app/