A friend gifted me Brunch at the Old Mill, but it won't let me download it......

@HillyBeth

Did you try going into purchase history and using the download button and not clicking the link that goes to the item in the store?

I had the same issue this week after discovering one of my store packs was not installed, could download from the store, but launcher refused to install it, saying I did not own it. What worked for me was being logged in to origin and having it online

@Plainevil
That didn't even occur to me as I am always logged in to Origin and online. Thanks for adding that suggestion!