"Invalid Argumen"t ERROR

Hi there ??
While using the search engine of wordpress, i’m getting shown this error on the top of the blog:

Warning: Invalid argument supplied for foreach() in /home/mhd-01/www.radiointerstella.com/htdocs/wp-content/plugins/ultimate-category-excluder/ultimate-category-excluder.php on line 133

The search is working well, and the plugin too, but i’m getting print this error at the top :S

Thanks for the support!

https://www.ads-software.com/plugins/ultimate-category-excluder/