Sorry to hear you’re still receiving this error.
If logging out and back into your MetaMask wallet did not resolve the issue, please try the following:
- Clear your web browser cache, log back into your MetaMask account and try the transaction again.
- Securely save and store your secret seed phrase and any private keys you have imported to your wallet. Next, uninstall and reinstall MetaMask, restore your wallet with your secret seed phrase, & try the transaction again. Please note this will remove any RPC networks or custom tokens and other settings you’ve added to your wallet, but can easily be added back once you restore your wallet.