Subdomain is rejecting the Google site kit verification for my subdomain

Hi support,
I have one main domain where i have installed wordfence plugin.
Again i have created an another website in a subdomain from that main domain. So when i have installed the Google Site Kit plugin in that sub domain, it is not proceeding and in a new page the wordfence is showing an error as “Block Reason: A potentially unsafe operation has been detected in your request to this site”

Please help me how to fix it.

The page I need help with: [log in to see the link]