Chainlink VRF – Troubleshooting VRFCoordinatorV2Mock Contract Error

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

const { verify } = require("../utils/verify");

const VRF_SUB_FUND_AMOUNT = ethers.utils.parseEther("30")


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


  if (developmentChains.includes(network.name)) {
    const VRFCoordinatorV2Mock = await ethers.getContract(
      "VRFCoordinatorV2Mock"
    )
    vrfCoordinatorV2Address = VRFCoordinatorV2Mock.address

    const transactionResponse = await VRFCoordinatorV2Mock.createSubscription()
    const transactionReceipt = await transactionResponse.wait(1)
    subscriptionId = transactionReceipt.events[0].args.subId
    await VRFCoordinatorV2Mock.fundSubscription(
      subscriptionId,
      VRF_SUB_FUND_AMOUNT
    )
  } else {
    vrfCoordinatorV2Address = networkConfig[chainId]["vrfCoordinatorv2"]
    subscriptionId = networkConfig[chainId]["subscriptionId"]
  }


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

  const arguments = [
    vrfCoordinatorV2Address,
    enterenceFee,
    gasLane,
    subscriptionId,
    callbackGasLimit,
    interval,
  ]
  console.log(deployer)

  const lottery = await deploy("Lottery", {
    from: deployer,
    args: arguments,
    log: true,
    waitConformations: network.config.blockConformations || 1,
  })

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

  log("-----------------------------------")
}


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

An unexpected error occurred:

Error: ERROR processing C:\Users\user\OneDrive\Desktop\BlockChain\hardhat-lottery\deploy\01-deploy-lottery.js:
TypeError: from.toLowerCase is not a function
    at getFrom (C:\Users\user\OneDrive\Desktop\BlockChain\hardhat-lottery\node_modules\hardhat-deploy\src\helpers.ts:1740:34)
    at _deploy (C:\Users\user\OneDrive\Desktop\BlockChain\hardhat-lottery\node_modules\hardhat-deploy\src\helpers.ts:534:9)
    at processTicksAndRejections (node:internal/process/task_queues:96:5)
    at runNextTicks (node:internal/process/task_queues:65:3)
    at listOnTimeout (node:internal/timers:528:9)
    at processTimers (node:internal/timers:502:7)
    at _deployOne (C:\Users\user\OneDrive\Desktop\BlockChain\hardhat-lottery\node_modules\hardhat-deploy\src\helpers.ts:1005:16)       
    at Object.module.exports [as func] (C:\Users\user\OneDrive\Desktop\BlockChain\hardhat-lottery\deploy\01-deploy-lottery.js:50:19)   
    at DeploymentsManager.executeDeployScripts (C:\Users\user\OneDrive\Desktop\BlockChain\hardhat-lottery\node_modules\hardhat-deploy\src\DeploymentsManager.ts:1219:22)
    at DeploymentsManager.runDeploy (C:\Users\user\OneDrive\Desktop\BlockChain\hardhat-lottery\node_modules\hardhat-deploy\src\DeploymentsManager.ts:1052:5)
    at DeploymentsManager.executeDeployScripts (C:\Users\user\OneDrive\Desktop\BlockChain\hardhat-lottery\node_modules\hardhat-deploy\src\DeploymentsManager.ts:1222:19)
    at processTicksAndRejections (node:internal/process/task_queues:96:5

Can someone help me out with this.. I am having no idea what mistake I am making.