[CLOSED] OpenSeaClone - Fail with error 'ERC721: transfer caller is not owner nor approved'

[BlockstarMelvin]

Dear Support team,

I am having this error,
Fail with error ‘ERC721: transfer caller is not owner nor approved’
My contract address is:
0x4444b1de146f003fa32243c4e3f505463ce066f2
(https://mumbai.polygonscan.com/address/0x4444b1de146f003fa32243c4e3f505463ce066f2)

I just passed the 1:01 time in the youtube tutorial.

Hope you can guide or help me in resolving the error.

Thanks,
Melvin

[cryptokid]

You may have to give more info than a contract address.
Does the wallet address that tries to make the transfer own the nft or it is allowed to transfer it?

[BlockstarMelvin]

I bought the nft using my metamask from an anonymous user in mumbai polygon testnet,

Polygon Powered NFT Marketplace

Buying was successful, so now I owned it. Then I deployed my smart contract and sold the nft by clicking the sell button. Then the error came.

[cryptokid]

Can you check what is the owner of that token id? Just to be sure.

[BlockstarMelvin]

How do i check the owner of the token id? If you can please guide me, it will be highly appreciated. Thanks!

[BlockstarMelvin]

[BlockstarMelvin]

My metamask address:
0x501aBE8c6Bb40b20670E22dA5146970fAC010650

[BlockstarMelvin]

[BlockstarMelvin]

Created by:
0x00572839729763e3b6ae0c95ab8a8ec8e74561f2

[BlockstarMelvin]

Owned by:
0x501abe8c6bb40b20670e22da5146970fac010650

[BlockstarMelvin]

Events:

[alex]

Can you post a screenshot of your wallet address authenticated with the app. What is the NFT contract address and tokenId you are trying to sell? Post a screenshot of this as well on the OpenSea clone app.

You can check ownership directly on the contract - if it’s verified on the chain explorer, you can check it on there (ownerOf).

[BlockstarMelvin]

Dear Glad,

I captured screenshots of my process. I cannot find the (ownerOf) on the contract, maybe because it failed, is that assumption valid?
These are some of the details:

NFT Contract address:
0x43F7AeCaD9f7be0F682eaCb37d39Ec05dBB07080

Token Id:
2

network:
polygon mumbai testnet

deployed smart contract address:
0x3C5651221f12499bFf761672CDD51D006bb256b5

metamask address:
0x501aBE8c6Bb40b20670E22dA5146970fAC010650

transaction id:
0x050e19d42644f423a8efe40e9c548bd33441ab916ed175c4dc6472a5faa07047

Blockquote

[alex]

Yes it looks like you have ownership of that NFT - everything looks fine there. Check this thread for another user who got this error and updates on it. Looks like you have to use approve first in the app - I don’t think it’s covered in the tutorial. Since it looks like you’re testing directly with Remix, it wouldn’t be obvious.