I remember how that started with the shields years ago. They’re going to try to take away all of our ability to side load. Are we going to go back to flashing hardware with different OS’s again??
Had a girl buy a ONN box but it wouldn’t download the downloader app out the box
Get another one on Amazon. Set it up to run good for you. Pack the other one back up and send it back for refund or credit. Done. If the NEW one does the same or similar as the (supposedly) BAD one, then its highly likely a setup issue instead of a hardware issue. Troubleshooting 101 - Divide and Conquer.
