fa-pen icon could not be displayed in checkout page

Hi,

Your website is in maintenance so I can't look at the situation there.
The issue is probably caused by your template including an old version of font-awesome which overrides the latest version included by HikaShop and because of that it screws some icons. But I can't say for sure as I can't check the HTML / CSS of your website with it in maintenance.

Hi,

I'm still not able to check the issue there.
When I access the second page on your checkout, I don't see the login / registration form.
and the address area is not available as it only appears after you've logged in:
monosnap.com/file/QTPxelpdwRZ0j7vLpjDgrZ4sFqC3ki
I would recommend to add back the "login" view to your "checkout workflow" in your HikaShop configuration. Otherwise, your customers won't be able to create an account or login during your checkout and will be stuck like I am.

Hi,

The issue indeed comes from the font awesome included in your template. You can see that your template includes this file:
templates/j51_ariana/css/font-awesome.css
And if you open it, you can see at the top that the version is the 4.7.0 while HikaShop includes the 5.2.0
So the best would be to check with your template provider if they have a new version of their template with the latest version of font-awesome or if not ask them to update it.
Now in the mean time, you can add such CSS to avoid the problem for that icon:

.fa-pen:before {
content: "\f040"
}