project-8-token-lottery: Error InvalidSecpSignature when run anchor test

[tiulinh]

Hello admin.
I am very grateful for your knowledge to be shared. Through the knowledge you share I learn many new and very interesting things.
while practicing project-8-token-lottery. I get an error when running Anchor test. It is the error: "Program log: AnchorError occurred. Error Code: InvalidSecpSignature. Error Number: 6016. Error Message: InvalidSecpSignature" . I have tried many ways but have not fixed it. Please give me advice. Thank you so much!

My code in Anchor test:

it("Is committing and revealing a winner",async()=>{
    
    const queue = new anchor.web3.PublicKey("FfD96yeXs4cxZshoPPSKhSPgVQxLAJUT3gefgh84m1Di"); //devnet
    const queueAccount = new sb.Queue(switchboardProgram, queue);
    const rngKp = anchor.web3.Keypair.generate();

    
    try {
      await queueAccount.loadData(); 
    } catch (err) {
      console.log("Queue account not found");
      process.exit(1);
    }
    const [randomness, ix] = await sb.Randomness.create(switchboardProgram, rngKp, queue);
    console.log("Created randomness account..");
    console.log("Randomness account", randomness.pubkey.toBase58());
    console.log("rkp account", rngKp.publicKey.toBase58());
    
    const createRandomnessTx = await sb.asV0Tx({
      connection:provider. connection,
      ixs: [ix],
      payer: wallet.publicKey,
      signers: [wallet.payer,rngKp],
      computeUnitPrice: 75_000,
      computeUnitLimitMultiple: 1.3,
    });
    const blockhashContext = await provider.connection.getLatestBlockhashAndContext();
  
    const createRandomnessSignature = await provider.connection.sendTransaction(createRandomnessTx);
    await provider.connection.confirmTransaction({ //sign the transaction
      signature: createRandomnessSignature,
      blockhash: blockhashContext.value.blockhash,
      lastValidBlockHeight: blockhashContext.value.lastValidBlockHeight
    });
    console.log(
      "Transaction Signature for randomness account creation: ",
      createRandomnessSignature
    );

    const sbCommitIx = await randomness.commitIx(queue); 

     // commint a winer on chain.
      const commitIx = await program.methods.commitAWinner()
      .accounts(
        {
          randomnessAccountData: randomness.pubkey
        }
      )
      .instruction();
      const commitTx = await sb.asV0Tx({
        connection: switchboardProgram.provider.connection,
        ixs: [sbCommitIx, commitIx],
        payer: wallet.publicKey,
        signers: [wallet.payer],
        computeUnitPrice: 75_000,
        computeUnitLimitMultiple: 1.3,
      });
  
      const commitSignature = await provider.connection.sendTransaction(commitTx);
      await provider.connection.confirmTransaction({
        signature: commitSignature,
        blockhash: blockhashContext.value.blockhash,
        lastValidBlockHeight: blockhashContext.value.lastValidBlockHeight
      });
      console.log(
        "Transaction Signature for commit: ",
        commitSignature
      );

    // choose a winer
    const sbRevealIx = await randomness.revealIx();
    const revealIx = await program.methods.choseWiner()
      .accounts({
        randomnessAccountData: randomness.pubkey
      })
      .instruction();
    

    const revealTx = await sb.asV0Tx({
      connection: switchboardProgram.provider.connection,
      ixs: [sbRevealIx,revealIx],
      payer: wallet.publicKey,
      signers: [wallet.payer],
      computeUnitPrice: 75_000,
      computeUnitLimitMultiple: 1.3,
    });

    const revealSignature = await provider.connection.sendTransaction(revealTx);
    await provider.connection.confirmTransaction({
      signature: revealSignature,
      blockhash: blockhashContext.value.blockhash,
      lastValidBlockHeight: blockhashContext.value.lastValidBlockHeight
    });
    // await provider.connection.confirmTransaction(revealSignature,"confirmed");
    console.log("Transaction Signature revealTx: ", revealSignature);
   

  });