If it is not a newly created ONT ID , you may need to add BSC wallet. Click the Wallet management button at the top left of the ONTO Assets Page, click the ellipsis on the right side of the wallet-"Add New Wallet", select "Binance Smart Chain" and click "Confirm", enter the wallet password and you can successfully add BSC wallet. Then you can send or receive BSC assets to participate ONTO & Acryptos event.