On Cloudflare they give you the option to use Access which uses third party auth providers to authenticate you for you to be able to access the site. Basically, you can’t access the home assistant login until you verify with your Google account or whatever auth provider you set up in Cloudflare. This is intentional, however with it set up the home assistant app bugs out and opens up thousands of tabs with the Cloudflare Access verification. I would love to see support for Cloudflare Access ZT.