Inventory look up failure

[0.18.0.0]

Cannot purchase anything from any shops in the plaza, I get the Transaction failed - Error: INVENTORY LOOK UP FAILURE each time. I can purchase things from the tower express but I’m trying to buy catsacks from the stray which isn’t in tower express.

I have tried refreshing inventory, restarting game, restarting computer. I even tried on a different day altogether, different plazas, different shops and still same error.

Steam had some downtime and took one of our backend servers offline. It’s now resolved.