The Chinese parent company behind short video app TikTok has filed a new legal challenge against the Trump administration.

A U.S. government order is forcing Bytedance to sell TikTok's American operations.

However, late on Tuesday, Bytedance asked a U.S. appeals court for a review of the order, which it claims is unconstitutional.

President Donald Trump signed the executive order in August, giving ByteDance 90 days to divest TikTok's U.S. operations or risk being banned.

The Thursday deadline is now fast approaching.

The Trump administration contends TikTok poses a national security threat -- saying it could give China's government access to the personal data of over 100 million American users.

TikTok denies the allegations.

ByteDance has been in talks with Walmart and Oracle to shift TikTok's U.S. assets into a new entity, and is requesting a 30-day extension on the divestment order, so it can finalize the terms of the deal.

One sticky issue that remains is who owns what in the new company, TikTok Global.

But ByteDance says communications with the government have stalled, and wants more time.

The White House and Treasury declined to comment, while the Justice Department did not immediately respond to a request for comment.

Separate restrictions on TikTok have already been blocked by federal courts, including a ban which would've removed TikTok from Apple and Google's U.S. app stores.