Hi,
The IP Whois box just shows an endless loading animation on all of my sites. This is related to the BBQ Firewall plugin which blocks the following request with a 403 response:
GET https://(hostname)/wp-admin/admin-ajax.php?ip=(ipv4)&ajax_route=ip_extra_info&action=cerber_ajax&ajax_nonce=ff251709be&request=0&referrer_page_url=https://(hostname)/wp-admin/admin.php?page=cerber-security&tab=activity&filter_ip=(ipv4)
A similar case was discussed in the BBQ Firewall support area, where Jeff pointed out that an unexpected “:” (colon) causes the issue. My guess is that the referrer_page_url parameter should be properly escaped.