Got Sea Of Thieves and have been playing it, but suddenly I get a check your account message?

Hello,

The Freinds Play Free event was a Seven day event. The event is now over, unless you have GamePass you will need to purchase the full game to continue playing.

If you enjoyed the game, it is a relatively cheaper game, and its a play anywhere title. So if you do decide to purchase it, it wont dent your wallet.

Sorry for the inconvenience. Please let us know if you have further questions.

the “Friends Play Free” initiative. As detailed in a new trailer, Sea of Thieves players will be able to receive three invite codes that they can give to their friends to provide them with free access to the game for one week,
with the event running from February 6-13 2019.

Hi,

The free play days are over for the game to continue playing the game you need to purchase the game or buy a gamepass

With free play weekends the games are on free for those dates. If you haven't bought the game or don't have game pass, you would need to do so in order to continue playing.

You only got to play for the duration of the event. You would need to purchase it now