I have my hosting in 1&1 and my names servers point to Cloudflare.
So, I made my multi-site Worpress, configure wp-config and .htaccess correctly and create a new subdomain https://pt.casinosconbitcoin.com, Create the subdomain in 1&1 and also configure the DNS in Cloudflare.
but it still gives me problems, the subdomain does not work:ERR_TOO_MANY_REDIRECTS
I have SSL configured with Cloudflare.