将管理员安全类别“http”更改为“https://”后,无法访问我的magento管理员

Cannot access my magento admin after change in admin secure category "http" to "https://" this is the error: 404 Not Found The server can not find the requested page: EXAMPLE.COM/index.php/admin (port 443)

If you have access to PHPMYADMIN than you can restore the URL.
- Open your site database
- Search for the core_config_data table and click Browse.
- Locate the rows to edit : web/unsecure/base_url and web/secure/base_url

Thanks

I've had the same issue and is related to your .htaccess do you really have this file? and check if mod_rewrite enabled.