Failed to serialize or deserialize account data: Unknown

[web-full-stack-developer]

I was creating spl token with metadata using createCreateMetadataAccountV3Instruction function of "@metaplex-foundation/mpl-token-metadata": "^2.5.2"
I got error like SendTransactionError: failed to send transaction: Transaction simulation failed: Error processing Instruction 0: Failed to serialize or deserialize account data: Unknown at Connection.sendEncodedTransaction (E:\02-08 (token-create-app)\mint\node_modules\@solana\web3.js\src\connection.ts:5921:13) at processTicksAndRejections (node:internal/process/task_queues:95:5) at async Connection.sendRawTransaction (E:\02-08 (token-create-app)\mint\node_modules\@solana\web3.js\src\connection.ts:5880:20) at async Object.sendTransaction (E:\02-08 (token-create-app)\mint\node_modules\@metaplex-foundation\umi-rpc-web3js\src\createWeb3JsRpc.ts:327:25) { logs: [ 'Program metaqbxxUerdq28cj1RbAWkYQm3ybzjb6a8bt518x1s invoke [1]', 'Program log: Error: BorshIoError', 'Program metaqbxxUerdq28cj1RbAWkYQm3ybzjb6a8bt518x1s consumed 2755 of 200000 compute units', 'Program metaqbxxUerdq28cj1RbAWkYQm3ybzjb6a8bt518x1s failed: **Failed to serialize or deserialize account data: Unknown'** ] }

my script is

import { Keypair, clusterApiUrl, Connection, PublicKey, Transaction, sendAndConfirmTransaction, SystemProgram } from "@solana/web3.js";
import { createCreateMetadataAccountV3Instruction, PROGRAM_ID } from "@metaplex-foundation/mpl-token-metadata";
import { MINT_SIZE, TOKEN_PROGRAM_ID, createInitializeMintInstruction, getMinimumBalanceForRentExemptMint, getAssociatedTokenAddress, createAssociatedTokenAccountInstruction, createMintToInstruction } from '@solana/spl-token';
const connection = new Connection(clusterApiUrl('testnet'), 'confirmed');
import secret from './guideSecret.json';
const payer = Keypair.fromSecretKey(new Uint8Array(secret));
const run = async () => {
    const mintKeypair = new PublicKey("GKaVDS9kJYkXMYqwbLMqK3au1nyp1HKhcGYRnzJ2ErKs");
	const metaPDA = PublicKey.findProgramAddressSync(
		[
			Buffer.from("metadata"),
			PROGRAM_ID.toBuffer(),
			mintKeypair.toBuffer(),
		],
		PROGRAM_ID,
	)[0];
	console.log(metaPDA.toBase58());
	const createMetadataInstruction = createCreateMetadataAccountV3Instruction(
		{
			metadata: metaPDA,
			mint: mintKeypair,
			mintAuthority: payer.publicKey,
			payer: payer.publicKey,
			updateAuthority: payer.publicKey,
			systemProgram: SystemProgram.programId
		},
		{
			createMetadataAccountArgsV3: {
				data: {
					name: "This is test",
					symbol: "TTT",
					uri: "",
					creators: null,
					sellerFeeBasisPoints: 0,
					uses: null,
					collection: null,
				},
				isMutable: false,
				collectionDetails: null,
			},
		},
	);
	const createNewTokenTransaction = new Transaction().add(
		createMetadataInstruction
	);
	sendAndConfirmTransaction(
		connection,
		createNewTokenTransaction,
		[payer],
	).then(signature => {
		console.log('SIGNATURE', signature);
	})
}
run();

This script was working well on devnet, was not working on testnet, mainnet-beta
Please fix it for me

[Tgcohce]

You should check the transaction you are signing and if you are using .serialize() for the signed transaction.