Add file at the root of mapped domain in multisite
I have a multisite (let’s call it multisite.com) with subdomains and domain mapping.
One of the subdomains (id 11) is mapped to domain.com, on which I am using AdSense.
I just got a notification from Google that I need to add a file ads.txt at the root of domain.com.
I added the file at the root of the main multisite.com domain, but obviously, when I try domain.com/ads.txt I get a 404, not found.
I also uploaded the file on the uploads folder of the subdomain, which is multisite.com/wp-content/uploads/sites/11
But this is not the solution either.
Is there any way I can upload a file to be found at a root of a subdomain mapped to a domain.com?