Lesson 7 - Error deploying mocks - 10:48

[Basem815]

hardhat-config.js:

require("@nomicfoundation/hardhat-toolbox");
require("hardhat-deploy");
module.exports = {
  solidity: {
    compilers: [{ version: "0.8.8" }, { version: "0.6.6" }],
  },
  namedAccounts: {
    deployer: {
      default: 0,
    },
  },
};

helper-hardhat.config:

const networkConfig = {
  11155111: {
    name: "sepolia",
    ethUsdPriceFeed: "0x694AA1769357215DE4FAC081bf1f309aDC325306",
  },
  137: {
    name: "polygon",
    ethUsdPriceFeed: "0xF9680D99D6C9589e2a93a78A04A279e509205945",
  },
  31337: {
    name: "localhost",
  },
};
const developmentChains = ["hardhat", "localhost"];

const DECIMALS = 8;
const INITIAL_ANSWER = 200000000000;

module.exports = {
  networkConfig,
  developmentChains,
  DECIMALS,
  INITIAL_ANSWER,
};

MockV3Aggregator:

// SPDC-License-Identifier: MIT

pragma solidity ^0.6.0;

import "@chainlink/contracts/src/v0.6/tests/MockV3Aggregator.sol";

00-deploy-mock:

' const { network } = require("hardhat");
const {
  developmentChains,
  DECIMALS,
  INITIAL_ANSWER,
} = require("../helper-hardhat-config");

module.exports = async ({ getNamedAccounts, deployments }) => {
  const { deploy, log } = deployments;
  const deployer = await getNamedAccounts(); // When working with ethers we can get the accounts using this function
  const chainId = network.config.chainId;

  if (developmentChains.includes(network.name)) {
    log("Local network detected! Deploying mocks..");
    await deploy("MockV3Aggregator", {
      contract: "MockV3Aggregator",
      from: deployer,
      log: true,
      args: [DECIMALS, INITIAL_ANSWER],
    });
    log("Mock deployed!");
    log("-------------------------------------------");
  }
};
module.exports.tags = ["all", "mocks"];

When I try to run the command: yarn hardhat deploy --tags mocks I get the log output of Local network detected! Deploying mocks..
but immediately after I get the following error
from.toLowerCase is not a function

I can't seem to figure out why this error is generated. I've cross-referenced the code on the repository and it doesn't appear to have any differences (up until this part) so I'm not sure how to fix it. Any ideas?

[Basem815]

1 hour later: Forgot the curly parenthesis around deployer in 00-deploy-mock.js :')