TypeError: Cannot read properties of undefined (reading 'includes')

[Pif50]

Hi everyone. I'm stuck at 10:58:56, when Patrick is trying to deploy.

When I deploy I have an error TypeError: Cannot read properties of undefined (reading 'includes').

01-deploy-fun-me.js

const { network } = require("hardhat")
  const { networkConfig, developmentChains } = require("../helper-hardhat-config")
  const { verify } = require("../utils/verify")

  module.exports = async ({ getNamedAccounts, deployments }) => {
      const { deploy, log } = deployments
      const { deployer } = await getNamedAccounts() //getNamedAccounts is a way for get a named account
      const chainId = network.config.chainId

    let ethUsdPriceFeedAddress
    if (chainId == 31337) {
        const ethUsdAggregator = await deployments.get("MockV3Aggregator")
        ethUsdPriceFeedAddress = ethUsdAggregator.address
    } else {
        ethUsdPriceFeedAddress = networkConfig[chainId]["ethUsdPriceFeed"]
    }

    log("----------------------------------------------------")
    log("Deploying FundMe and waiting for confirmations...")

    const args = [ethUsdPriceFeedAddress]
    const fundMe = await deploy("FundMe", {
        from: deployer,
        args: args, //put price feed address
        log: true,
        waitConfirmations: network.config.blockConfirmations || 1,
    })

    log(`FundMe deployed at ${fundMe.address}`)

    if (
        !developmentChains.includes(network.name) &&
        process.env.ETHERSCAN_API_KEY
    ) {
        await verify(fundMe.address, args)
    }
    log("-------------------------------------------------------------------------------------------------------------------")
}

module.exports.tags = ["all", "fundme"]

hardhat.config.js

require("@nomicfoundation/hardhat-toolbox");
require("dotenv").config()
require("@nomiclabs/hardhat-etherscan");
require("hardhat-gas-reporter")
require("solidity-coverage")
require("hardhat-deploy")

/** @type import('hardhat/config').HardhatUserConfig */

const GOERLI_RPC_URL = process.env.GOERLI_RPC_URL
const PRIVATE_KEY = process.env.PRIVATE_KEY
const ETHERSCAN_API_KEY = process.env.ETHERSCAN_API_KEY
const COINMARKETCAP_API_KEY = process.env.COINMARKETCAP_API_KEY

module.exports = {
  //solidity: "0.8.8",
  solidity: {
    compilers: [
      { version: "0.8.8" },
      { version: "0.6.6" }
    ],
  },
  defaultNetwork: "hardhat",
  networks: {
    goerli: {
      url: GOERLI_RPC_URL,
      accounts: [PRIVATE_KEY],
      chainId: 5,
      blockConfirmation: 6,
    },
    localhost: {
      url: "http://127.0.0.1:8545/",
      chainId: 31337,
    }
  },
  etherscan: {
    apiKey: ETHERSCAN_API_KEY,
  },
  gasReporter: {
    enabled: true,
    currency: "USD",
    outputFile: "gas-report.txt",
    noColors: true,
    coinmarketcap: COINMARKETCAP_API_KEY,
  },
  namedAccounts: {
    deployer: {
      default: 0,
    },
  },

};

helper-hardhat-config.js

const networkConfig = {
    31337: {
        name: "localhost",
    },
    5: {
        name: "goerli",
        ethUsdPriceFeed: "0xD4a33860578De61DBAbDc8BFdb98FD742fA7028e",
    },
}

const developmentChain = ["hardhat", "localhost"]
const DECIMALS = 8
const INITIAL_ANSWER = 200000000000

module.exports = {
    networkConfig,
    developmentChain,
    DECIMALS,
    INITIAL_ANSWER
}

[Pif50]

I wrote developmentChains, in helper-hardhat-cofig.js, without 's' final