How can I solve my problem at Ergo Auctions

https://ergoauctions.org/#/auction/specific/5c36346a4a397e54cbac6a77e2d32e6b40b5461bce19b4816cdf70f6971e26ad

Is it possible to reverse this situation or add nft in some way?

Sadly not.
On the bright side, the only mistake you made there was not ticking the “upload artwork” box when you minted the NFT, so you can fix this by starting another auction and ticking the “upload artwork” box when you’re minting it on ErgoUtils :slight_smile: