I was buying items for quests and I kept getting the "You don't have all the items for this quest!" error so I thought I had forgotten to buy an item, but both the shop search tabs showed that I did buy them. I checked my inventory, and the items were nowhere to be found. I updated the quest page in case I had already finished the quest, but no. I tried buying more of the items, and they didn't turn up in my inventory either.
The items were and
Just tried buying a and it didn't show up either.
Account search shows that the item is not anywhere on my account (except in my sticker album, but I had it there prior). I've got the latest version of Chrome.
I'm having the same problem and started a thread about it. Check your points, I'm down abut 10K for a 1700 sP item I kept trying to buy.

Shoot, I didn't see your post there!
Sadly I don't really keep a track of the sP I have, so I have no idea who much I had on hand before trying to buy those.
I just grabbed an item from the donation center (a Random Beanbag I think ?) and it's not showing up. I also got a MySQL Error when I grabbed it.
... And also getting MySQL Error while trying to do BQ's.
Not working for several of us. If you buy from a npc shop do you get the SQL error screen? That darn squirrel :(
[tot=tigermom123]
Same, I bought Arid Subeta Conditioner twice I think (once for sure from a user shop, tried once from main shops but it didn't show up in inventory, tried again and got an SQL error), and Field Anyu Beanbag three times for sure, from user shops. I know for a fact it took my sp on the third purchase of the Beanbag. Wasn't paying attention to the sp on the other purchases, sorry :(