Subdomain works but main domain does not

[Piotr1]

Website URL

cuper.dev

Error Message

ERR_TOO_MANY_REDIRECTS

Other Information

my subdomain piotr.cuper.dev works perfectly
the website is using cloudflare

[JxstErg1]

Hi and welcome to the forum! You’re using Cloudflare Flexible SSL, which needs some more steps to work correctly on WordPress (if you’re using that):

How to make Cloudflare Flexible SSL work with WordPress

WordPress is a great and very popular website building tool, and Cloudflare is a great way to get HTTPS on your website for free. Thanks to Cloudflare’s Flexible SSL system, you don’t even need to manage SSL certificates to use it! However, getting WordPress to show a padlock and make all pages work can be a bit tricky. This article explains a good way to configure your website correctly with Cloudflare Flexible SSL. Heads up! Instead of making WordPress work with Flexible SSL, you can also c…

The easiest, fastest and best way to solve it is to configure Cloudflare’s Full SSL with a self-signed certificate by following the instructions on this article:

How to setup Full SSL with Cloudflare

By default, Cloudflare uses a system called “Flexible SSL”. In this system, Cloudflare secures the connection between your visitors and Cloudflare, but not the connection between Cloudflare and your website. Not only is this less secure, some websites (notably WordPress) have trouble detecting whether HTTPS is in use, causing all sorts of issues. The best way to resolve this is by using Full SSL in Cloudflare. This way, the connection between Cloudflare and your website is encrypted, and your w…

[Piotr1]

Hi i’m not using wordpress and following the instrustions didn’t change anything

[JxstErg1]

Can you check the .htaccess file on your domain’s htdocs folder for any redirect line and, if any, remove it?

[Piotr1]

it doesn’t have any redirects

[Ziverre]

According to the redirect checker tool, your website redirects to http if https and https if http. Please show the content of the htaccess file.

[Piotr1]

content of .htacess file

php_value display_errors Off
php_value mbstring.http_input auto
php_value date.timezone Europe/Warsaw

[Piotr1]

i have found the solution, the index.html had uppercase I which turned out to not be supported