The app has stopped working because of a federal law that called for TikTok to be banned if it didn’t find a new owner that isn’t Chinese. The app shut down just before the deadline, which was Sunday.

TikTok was removed from app stores on Saturday night as a federal law banning the platform came into effect, leaving users unable to download or even use the app at all.

TikTok is now unavailable in the United States—and getting around the ban isn’t as simple as using a VPN. Here’s what you ...