zdenga Hey man, thank you for reply i am fix that problem with editing in index.php file http to https...
There are different other ways for making http to https without editing the index.php or htaccess which i consider them to be safe! If you don't have the original htacess, don't worry, i will add it here for you.
you can change http to https via cpanel
Login and search domain click on
next page force https redirect
on cloudflare ssl/TLS