"No Bag Entry" when trying to reinstall Sierra Was given a MacBook Air (2013) secondhand, with one stipulation being that I delete the previous owner's info and items off of the Macbook before I started using it. Did that to Apple's specifications on their website, but whenever it boots into Recovery Mode and I click on reinstall Sierra, I get a "no bag entry" error after clicking go on the MacOS Sierra screen.

I'm at my wits end, and this is basically my last option before I call it quits. Can anyone guide me?
Make sure you're connected to internet before you enter the re-install flow. The machine needs to talk to Apple's servers to verify the license, that's why this error comes up.