Typo leading to error 400 leading to ban

in the line 181 of cleantalk.php you have a typo add_action(‘wp_ajax_apbct_apbct_get_pixel_url’, ‘apbct_get_pixel_url__ajax’); where it should be
add_action(‘wp_ajax_apbct_get_pixel_url’, ‘apbct_get_pixel_url__ajax’);

it leads to error 400 for users that are logged in but do not have pixel_url in local storage yet, and such error 400 on /wp-admin/admin-ajax.php may lead to ban on fail2ban