Hi,
We do not delete messages unless they are spam which wouldn't be the case. So I don't know why there is no such message from you.
If you have other HikaShop stores with the same hosting environment without the issue, then you need to check what's left:
- a different template ? In that case, try to switch the template temporarily to the default one of Joomla and see if that helps.
- plugins of the "system" group that you don't have on the other stores ? Try to disable these plugins and see if that helps.
besides that I don't know. As you said, and as I already said in my previous message, I don't think it comes from the hosting.
And as you know already, it doesn't come from HikaShop either since it works fine for your other stores and everyone else. So that leaves only other extensions or something done differently in the hosting ( are the servers configured similarly ? maybe you have only one server with all the websites on it ? Or maybe it's different servers with different software ? )
However, I don't think the issue is related to HikaShop, specially if you analyse the network logs.
Did you tried to log-in in the front-end with Safari or Edge ?
Because I don't think it would work since there are some cookie setting issues.
See :
pasteboard.co/Hyy1t0q.png
The "set-cookie" returned by your server indicates that the path is "levi" ; unfortunately, your website is not working in that path (anymore ?).
So, browsers such as "Safari", "Edge" or "Firefox" discard that cookie since the path is not the right one.
Without a cookie, you do not have a session ; so you cannot add anything in the cart nor be logged with an account. That issue is affecting your whole website and not just HikaShop.
Regarding Chrome ; that browser just doesn't follow the order and take the cookie event if the path is not correct. It just do whatever it think it's best to avoid issues (even accepting a incorrect cookie).
At the end, your issue is a website cookie configuration issue which result to the fact that Safari, Edge and Firefox do not have sessions anymore. One side effect (that you saw) is that you cannot add products into the cart (which needs a session).
Another side effect (that you didn't saw) is that you can't log-in or do any action in your website which require the session. (Issue which is outside the limit of our support since it is not an HikaShop bug)