Error – causing problems

Until recently, everything was A-OK, but now we are getting this error at the top of the page and it’s conflicting with WooCommerce.

All active plugins are up-to-date and using WP version 4.2.2

Warning: in_array() expects parameter 2 to be array, null given in /home/content/99/11036299/html/wp-content/plugins/strong-testimonials/includes/admin.php on line 65

Have had to deactivate the plugin for now, hoping you can help fix this.

Thanks!

https://ww.wp.xz.cn/plugins/strong-testimonials/