The error is originated from the theme, it refers to this file: /var/www/clients/client1/web5/web/wp-content/themes/odiseea/functions.php
I suggest asking the theme developer what exactly might be the issue, it looks like it’s a problem with the $query_args array, when it’s passed to the urlencode function, it might be multi-dimensional and for that the array_map will fail.
It does not seem to be realted to the plugin I’m afraid.