This usually means you are trying to flash a ROM file meant for a different device variant, or your TWRP version is outdated. Double-check your model number (YT3850F) and update TWRP.
Disclaimer: Installing custom ROMs voids warranties and carries risks, including bricking your device. Proceed with caution and at your own risk. yt3850f custom rom updated
The on your computer (Windows, macOS, Linux) This usually means you are trying to flash