When I click sims in my first home business, there's an option saying "restock" but nothing happens when I click it. Is this from the original game, and not doing anything for some other reason? Should it be there...?

It will only do anything if items for sale need restocking. It's always there for sims from the household that own the business, but there's nothing for it to do when nothing's been sold yet, except wait around for a customer to pick something up and pounce on the restocking.

"Restock" on your Sims is an option for restocking shelves, if you have merchandise for sale. Perhaps your home business has no merchandise for sale yet, and needs to be set as such, then sold, before your Sims can restock those sold merchandise.

EDIT: Ninja'd. Then again, by 5 minutes, this board doesn't update that quickly, I guess.

When I saw the title I at first thought this was some sort of a glitch where you could "Restock" a Sim that has been sold out!

Setting the "Restock" option on a Sim is basically the same as assigning an employee to restock. As soon as there's something that's been sold out, they'll head towards it and restock it. If there isn't anything that needs tending to, they'll just walk around the store.

@d_dgjdhh it's to do with the code war between Classic and Bootstrap.