To accept this offer, you must first cancel the auction to remove your asset from the auction contract.Keep this tab open. Once complete, you will be able to click "Accept Offer" again to execute the transaction.
Alert: these are not Cryptovoxels parcels. User names and avatars in Cryptovoxels are an ERC721 token. You can mint yourself any valid name just for the price of gas. Cryptovoxels names are displayed above your head when you're in world, and displayed instead of your wallet address everywhere on Cryptovoxels that parcel owners are listed.