This issue builds off of a problem that you've already created a thread for.
I know you're used to making new threads every time one little thing changes, but please try to limit that here. I'm not staff; I'm just requesting that as a member.
Relating to your issue, it's probably an issue with your shop database. I told you last time that it was an issue with your identities, so I'm guessing you erased your entire shop database (resetting identities in the process, but wiping out everything else). It's probably not loading the items on the server side. Either way, breakpoint the load function and check the database for yourself. You should also breakpoint the item purchase handler. Try to keep these debugging procedures in mind, because I've told you about breakpointing once before, and it's a common way of figuring out fixes for bugs on your own. We can't hold your hand for every problem you come across (or I won't at least). Cheers.