Chrome OS and Brower
I have the items for Mori, or at least I think I do/thought I did. That is to say I bought the items and they show up in my Inventory, but the purchase page is blank at the time of purchase instead of getting a success you bought it message. Mori then takes the items but says I don't have them. Multiple attempts get the same results.
Changing to Alexander and doing a quest with him and going back to Mori OR quitting the problematic quest seems to solve the problem, so it's a weird little quirk.