If it is not a newly created ONT ID , you may need to add OKC 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 "OKC" and click "Confirm", enter the wallet password and you can successfully add OKC wallet. Then you can send or receive OKC assets to participate ONTO & KSwap event.