Double-Test the wallet you connected could be the wallet that contains the NFTs you’re trying to provide. Should you own more than one crypto wallet, odds are maybe you have connected the wrong one. By the tip from the tutorial, you'll have a deployed NFT contract on the Rinkeby community, https://trentoneketh.ambien-blog.com/23066581/top-latest-five-nft-on-opensea-urban-news