Bugs in 3.0.2 version

Bugs in 3.0.2 version in frontpage shows sth like this:

Warning: array_diff(): Expected parameter 2 to be an array, string given in /home/XXX/domains/XXX/public_html/wp-content/plugins/kk-star-ratings/src/functions.php on line 218

Warning: count(): Parameter must be an array or an object that implements Countable in /home/XXX/domains/XXX/public_html/wp-content/plugins/kk-star-ratings/src/functions.php on line 222

i had to go back to 2.6.4