TypeError: Cannot read properties of undefined (reading '0')

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

const VRF_SUB_FUND_AMOUNT = ethers.parseEther("30")

module.exports = async function ({ getNamedAccounts, deployments }) { const { deploy, log } = deployments const { deployer } = await getNamedAccounts() const chainId = network.config.chainId let vrfCoordinatorV2Address, subscriptionId

if (developmentChains.includes(network.name)) {
    const vrfCoordinatorV2Mock = await ethers.getContract("VRFCoordinatorV2Mock")
    vrfCoordinatorV2Address = vrfCoordinatorV2Mock.getAddress()
    const transactionResponse = await vrfCoordinatorV2Mock.createSubscription()
    const transactionReceipt = await transactionResponse.wait()
    //console.log(transactionReceipt)
    subscriptionId = transactionReceipt.events[0].args.subId
    // fund the subscription
    // usually, you'd need the link token on a reel network
    await vrfCoordinatorV2Mock.fundSubscription(subscriptionId, VRF_SUB_FUND_AMOUNT)
} else {
    vrfCoordinatorV2Address = networkConfig[chainId]["vrfCoordinatorV2"]
    subscriptionId = networkConfig[chainId]["subscriptionId"]
}

const entranceFee = networkConfig[chainId]["entranceFee"]
const gasLane = networkConfig[chainId]["gasLane"]
const callbackGasLimit = networkConfig[chainId]["callbackGasLimit"]
const interval = networkConfig[chainId]["interval"]

const args = [
    vrfCoordinatorV2Address,
    entranceFee,
    gasLane,
    subscriptionId,
    callbackGasLimit,
    interval,
]
const raffle = await deploy("Raffle", {
    from: deployer,
    args: args,
    log: true,
    waitConfirmations: network.config.blockConfirmations || 1,
})

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

}

module.exports.tags = ["all", "raffle"] `

getting error while accessing subId from events

subscriptionId = transactionReceipt.events[0].args.subId

PatrickAlphaC / hardhat-smartcontract-lottery-fcc

TypeError: Cannot read properties of undefined (reading '0') #173