The Chinese-owned social media app is required to divest from its parent company or face a federal ban

Some 170 million US users of the viral social media app TikTok faced a blackout of the service on Saturday, days after the Supreme Court passed a decision that could lead to a national ban of the platform.

On Friday, the Supreme Court ruled that TikTok needs to divest from its Chinese parent company, ByteDance, by Sunday or face a ban.

Late Saturday, users in the US received an update for TikTok, blocking the application’s use and explaining the outage.

“We regret that a US law banning TikTok will take effect on January 19 and force us to make our services temporarily unavailable,” the messages said. “We’re working to restore our service in the US as soon as possible.”

TikTok warned about the possible suspension of its services in a statement on its newsroom page on Saturday.

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“Unless the Biden Administration immediately provides a definitive statement to satisfy the most critical service providers assuring non-enforcement, unfortunately TikTok will be forced to go dark on January 19,” TikTok said in the statement.

The Supreme Court’s decision stems from allegations that ByteDance’s ownership of TikTok poses a risk to US national security. According to the court, the app’s ownership could potentially allow the Chinese government access to American users’ data.

TikTok has dismissed allegations that its Chinese ownership poses a threat, maintaining that it has “never shared” American users’ data with Beijing.

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President-elect Donald Trump has signaled that he will probably give the app a temporary reprieve from the ban to allow it to sell to a non-Chinese company. Trump will “most likely” give the app a “90-day extension,” he told NBC news in a phone interview on Saturday.