Hi! The monster guy keeps aggresively screaming at me that my inventory is full and I cannot buy any items, among other things that he does not let me do. How do I move items into my vault? By the way, whenever I use the newer version of the website, I can only view the news page, and there is no option to do anything else that I could find, and so I am forced to use the older format, where some things do not work right and it keeps saying to use the new version, which is impossible when I am stuck on the news page. Any suggestions? Thanks!

when you click on an item in your inventory you should see options for what to do with that item, such as using it, moving it to your vault, or putting it in your shop.

you should definitely make a shop if you haven't already, as this will enable you to use the quick stock function to easily select multiple items and decide what to do with them all at once. (commerce > your shops > the little (qs) link next to your shop name)