Fix common TikTok Live Printer problems: nothing prints, the creator is not live, missing API key, blocked app on macOS, USB permission on Linux, busy port.
Status says “Must provide either apiKey or jwtKey”
Section titled “Status says “Must provide either apiKey or jwtKey””Add your Euler Stream API key under Connection.
Status says “The specified user is not currently live”
Section titled “Status says “The specified user is not currently live””The creator must be live before you click Start. Wait for the LIVE to begin and start again.
Test print does nothing over USB
Section titled “Test print does nothing over USB”- Make sure the printer is on, has paper, and shows up in the USB printer list (click the refresh icon).
- On Windows, switch to System printer. See printers.
- On Linux, add the udev rule from printers.
- Try Console to confirm the rest of the pipeline works; the receipt text appears in the terminal.
Receipts print but the avatar is missing
Section titled “Receipts print but the avatar is missing”The image could not be fetched or decoded; the rest of the receipt still prints. Check the computer’s internet connection. Some avatars are served only as WebP, which is not decoded yet.
The image is a black square
Section titled “The image is a black square”Thermal paper darkens midtones. Profile pictures are lightened automatically; if an image is still dark, increase the width so the dithering has more dots to work with.
macOS says the app is from an unidentified developer
Section titled “macOS says the app is from an unidentified developer”Right-click the file, choose Open, then Open again.
Port 7474 is busy
Section titled “Port 7474 is busy”The app tries the next few ports and prints the one it chose in the terminal. Open that address.
My configuration disappeared
Section titled “My configuration disappeared”It is stored in the browser you used. Open the same browser, or import the JSON file you exported.