wp5 error

[Wed Oct 24 10:49:18.218319 2018] [php7:notice] [pid 7842:tid 140600821135104] [client 10.155.11.109:53912] PHP Fatal error:  Uncaught Error: Cannot use object of type WP_Error as array in /usr/local/apache2/htdocs/cte.loc/wp5-woocommerce.cte.loc/wp-content/plugins/tornevall-networks-dnsbl-implementation/includes/api.php:48\nStack trace:\n#0 /usr/local/apache2/htdocs/cte.loc/wp5-woocommerce.cte.loc/wp-content/plugins/tornevall-networks-dnsbl-implementation/includes/api.php(117): torneApi('test', 'returnRandom', Array, false, NULL)\n#1 /usr/local/apache2/htdocs/cte.loc/wp5-woocommerce.cte.loc/wp-includes/class-wp-hook.php(286): tornevall_dnsbl_api('')\n#2 /usr/local/apache2/htdocs/cte.loc/wp5-woocommerce.cte.loc/wp-includes/class-wp-hook.php(310): WP_Hook->apply_filters('', Array)\n#3 /usr/local/apache2/htdocs/cte.loc/wp5-woocommerce.cte.loc/wp-includes/plugin.php(453): WP_Hook->do_action(Array)\n#4 /usr/local/apache2/htdocs/cte.loc/wp5-woocommerce.cte.loc/wp-admin/admin-ajax.php(99): do_action('wp_ajax_tornedn...')\n#5 {main}\n  thrown in /usr/local/apache2/htdocs/cte.loc/wp5-woocommerce.cte.loc/wp-content/plugins/tornevall-networks-dnsbl-implementation/includes/api.php on line 48, referer: http://wp5-woocommerce.cte.loc/wp-admin/admin.php?page=tornevallDnsblMenu