WalletSendTransactionError: Unexpected error

The error

WalletSendTransactionError: Unexpected error faced while sending the transaction

Code

const transactionSignature = await program.methods    .createToken(metadata.name, metadata.symbol, metadata.uri)    .accounts({        payer: publicKey,        mintAccount: publicKey,        metadataAccount: metadataAccount,        tokenMetadataProgram: TOKEN_METADATA_PROGRAM_ID,        tokenProgram: TOKEN_PROGRAM_ID,    })    .transaction();const txSig = await sendTransaction(transactionSignature, connection);

can anyone help me to resolve the same?