Ordering process is redirecting to empty cart in my Magento 1 installation. What I noticed is Magento creates a second "/" Session and Local storage variable and that is probably causing the redirect to empty cart and not success site. Also after log-in in get empty page site.
On all other shop sites there is always just one Session/Local variable.
This is happening on site example.com/index.php/checkout/onepage/.
Does anyone have any advise what is causing this (are there any setting related to that)? How could I resoltve this?