An Xbox Live Gold Subscription is required to access this feature

Let's try power cycling your console using the steps here:
http://xbx.lv/19Pxh2o

Any game that offers online multiplayer requires Xbox Live gold to be able to access the multiplayer features. Fortnight is no exception to this requirement.

Hello Mattzheo,

Thank you for posting on the Xbox forums. We understand that you are interested in learning why some free games require an Xbox Live Gold subscription. There is no charge required to purchase and download games like Call of Duty: Warzone, Fortnite,
Warframe and so forth. However, some of these free games are multiplayer only games. All Xbox users need an

Xbox Live Gold subscription to access multiplayer features. We hope this information helps Mattzheo!

An Xbox Live Gold Subscription is required to access the Online section of most if not all games on xbox.

Do you still have an Xbox live gold subscription?

To continue to have the license to play the Xbox One games It is required to keep a gold subscription active on the account. And NO sharing a gold subscription with another profile does not work.

The 360 games are not affected by the gold subscription requirement.

Once you renew the gold subscription you will gain access back to the licenses for the Xbox One Games with Gold.