TikTok went offline in the United States Saturday night, less than two hours before a ban was slated to go into effect.

NEW YORK (AP) — During his first term as president, Donald Trump led the effort to ban TikTok, the hugely popular video-sharing site he said posed a threat to U.S. national security. But on the eve of his return to the White House, the president-elect is being hailed as the app’s savior.

TikTok is unavailable for millions of users in the United States, reports say. NBC News reports the app began displaying a message saying, “Sorry, TikTok isn’t available right now.”