The Connection Lost error message is an alert that you are no longer connected to the game. Simply refresh the page to restore your connection.
A disconnection typically occurs because the Internet connection is interrupted or the game has been left idle for too long.
To minimize your risk of being disconnected from the game, play on a stable Internet connection, such as broadband or WiFi. 4G/5G connections are less consistent.
If you were in the middle of a bonus round, select the slot you had been playing. If the bonus round had spins remaining when you were disconnected, it will continue.