Glitch/bug

Plz help, I cannot place any items for sale. I cannot click the sell button, have tried on 3 devices. Sometimes I'm able to click on the sell button on podium but my inventory items are invisible. My store is empty so it is not my selling space. I'm able to place down up to 1200 items in my store but I'm nowhere near that, I counted 30. Barely started today after I upgraded my inventory space up to 19 items.