Main domain redirection and sub domain

Hi My subdomain https://www.clinicaderecuperacao.net.br/ working perfectly ,

but my main domain www.clinicaderecuperacao.net.br, only the home page working perfectly , and the post links working perfectly , but the wordpress login page is not working , it shows " This page isn’t working

www.clinicaderecuperacao.net.br redirected you too many times.

ERR_TOO_MANY_REDIRECTS" msg and , none of the internal desk board link working.
Now i am confused where to resolve it and how to resolve it as the site partially working but i am unable to access the admin desk board to modify or make any changes. Seriously need support to get out of this issues as soon as possible.

That domain is not using Cloudflare. It is using hostgator name servers and resolves to a hostgator server IP address.