This error seems to become more and more popular nowadays:
err_too_many_redirects
I’ve tried a lot of ways and these are steps you should do to solve this case.
Step 1: Open file wp-config.php
You can open it directly on your cPanel or Direct admin or via FTP to edit.
Step 2: Add the following code
define('WP_HOME','https://yourdomain.com');
define('WP_SITEURL','https://yourdomain.com');
define('FORCE_SSL_ADMIN', true);
if ($_SERVER['HTTP_X_FORWARDED_PROTO'] == 'https')
$_SERVER['HTTPS']='on';
Remember to replace yourdomain.com to your domain. The code should be added right below the first line.
Step 3: Save the file and Refresh your page.
That’s all. Happy Blogging!