Hello,
If you can't access to the last step of your checkout workflow, then it means that you actually have an error through one of your checkout step, if there is no error displayed, you'll probably find the solution
there
:
HikaShop uses the core Joomla messaging system to display messages on your website so if you don't see any message when you don't enter correct information during the checkout process, that's probably because your Joomla template does not contain the tag to display Joomla messages: <jdoc:include type="message" />