TikTok's U.S. ban arrived earlier than expected, logging users out abruptly on Saturday night before midnight ET. See how users are reacting to the sudden shutdown.

Users in the U.S. who opened the app were greeted with a message that read, "Sorry, TikTok isn't available right now."

The news comes as a law banning TikTok, which is owned by Chinese firm ByteDance, is set to go into effect on Jan. 19.

The Chinese-owned company said it would cut off its services unless the U.S. assures Apple, Google and other companies that they would not be punished for hosting and distributing TikTok.

Users were unable to access TikTok Saturday, instead seeing a pop-up message on their screens saying "a law banning TikTok has been enacted."

With a TikTok ban scheduled to go into effect in the United States on Sunday, many users began to see messages preventing them from using the app when they opened it after 10 p.m. Eastern on Saturday.

"We are fortunate that President Trump has indicated that he will work with us on a solution to reinstate TikTok once he takes office," the TikTok landing page reads

Tennis star Coco Gauff mourned the loss of TikTok's app back home, writing on a TV camera lens “RIP TikTok USA” and drawing a broken heart right after winning a match at the Australian Open to reach the quarterfinals.

TikTok is no longer operational in the U.S. and has been removed from app stores. Trump indicated a potential 90-day extension to the ban, while TikTok expressed regret and aims to restore services after the new law takes effect on January 19.

TikTok has been banned in the US due to national security concerns, effective January 19. US authorities worry the app could be used by the Chinese go

A law banning TikTok has been enacted in the US, according to an in-app pop-up message. Unfortunately, that means you can't use TikTok for now