"Variant Also Negotiates" Error Occurs When Linking With Ezoic Ads

I'm using Cloudflare Pages with a custom domain to host my current site, and I want to integrate Ezoic Ads. However, every time I integrate Ezoic with Cloudflare on their dashboard, I am getting a "Variant Also Negotiates" error. Is this not possible because the apex CNAME needs to be on Cloudflare? I'm a bit lost at the moment, so any help would be appreciated! Thanks!