FundMe.test.js Error: invalid BigNumber value (argument="value", value={}, code=INVALID_ARGUMENT, version=bignumber/5.7.0)

Hello im getting the following Error when i run my test on the withdraw functio:

`FundMe constructor ✓ sets the aggregator address correctly fund ✓ fails if u dont send enough eth ✓ updated the amount funded data structure ✓ adds funders to array of funders withdraw

  1) withdraw ETH from a single founder

4 passing (2s) 1 failing

1) FundMe withdraw withdraw ETH from a single founder: Error: invalid BigNumber value (argument="value", value={}, code=INVALID_ARGUMENT, version=bignumber/5.7.0) at Logger.makeError (node_modules/@ethersproject/logger/src.ts/index.ts:269:28) at Logger.throwError (node_modules/@ethersproject/logger/src.ts/index.ts:281:20) at Logger.throwArgumentError (node_modules/@ethersproject/logger/src.ts/index.ts:285:21) at Function.BigNumber.from (node_modules/@ethersproject/bignumber/src.ts/bignumber.ts:289:23) at toBN (node_modules/@ethersproject/bignumber/src.ts/bignumber.ts:345:27) at BigNumber.add (node_modules/@ethersproject/bignumber/src.ts/bignumber.ts:74:43) at Context. (test/unit/FundMe.test.js:75:39) 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)`

This is my code:

`const { assert, expect } = require("chai") const { deployments, ethers, getNamedAccounts } = require("hardhat") const { isCallTrace } = require("hardhat/internal/hardhat-network/stack-traces/message-trace")

describe("FundMe", async function() {

let fundMe 
let deployer
let mockV3Aggregator
const sendValue = ethers.utils.parseEther("5") 
beforeEach(async function() {
    deployer = (await getNamedAccounts()).deployer 
    await deployments.fixture(["all"]) 
    fundMe = await ethers.getContract("FundMe", deployer) 
    mockV3Aggregator = await ethers.getContract(
        "MockV3Aggregator",
        deployer
    )
})

describe("constructor", async function() {
    it("sets the aggregator address correctly", async function() {
        const response = await fundMe.priceFeed()
        assert.equal(response, mockV3Aggregator.address)
    })
})
describe("fund", async function() {
    it("fails if u dont send enough eth", async function() {
        await expect(fundMe.fund()).to.be.revertedWith(
            "failure, did not have enough"
        )
    })
    it("updated the amount funded data structure", async function() {
        await fundMe.fund({ value: sendValue })
        const response = await fundMe.addressToAmountFunded(deployer)
        assert.equal(response.toString(), sendValue.toString())
    })
    it("adds funders to array of funders", async function() {
        await fundMe.fund({ value: sendValue })
        const funder = await fundMe.funders(0)
        assert.equal(funder, deployer)
    })
})
describe("withdraw", async function() {
    beforeEach(async function() {
        await fundMe.fund({ value: sendValue })
    })
    it("withdraw ETH from a single founder", async function() {
        //arrange
        const startingFundMeBalance = await fundMe.provider.getBalance(
            fundMe.address
        ) 
        const startingDeployerBalance = fundMe.provider.getBalance(deployer)

        //act
        const transactionResponse = await fundMe.withdraw()
        const transactionReceipt = await transactionResponse.wait(1)

        //breakpoint the code will stop here
        const { gasUsed, effectiveGasPrice } = transactionReceipt // we pull out these to, from another object, the debugger?
        const gasCost = gasUsed.mul(effectiveGasPrice) //multiply them together *
        const endingFundMeBalance = await fundMe.provider.getBalance(
            fundMe.address
        )
        const endingDeployerBalance = await fundMe.provider.getBalance(
            deployer
        )
        //assert
        assert.equal(endingFundMeBalance, 0) //should be 0 because we just withdrew all the eth.
        assert.equal(
            startingFundMeBalance.add(startingDeployerBalance).toString(),
            endingDeployerBalance.add(gasCost).toString() // the starting FundMe balance + the deployer balance which should be equal to the amount he deployed in the first place, we use .add because it reads from the blockchain and it's a bigNumber. we also add gas cost to the ending, because otherwise it wont be equal, because he paid a bit of gas when he called the function ofc.
        )
    })
})

})`

PatrickAlphaC / hardhat-fund-me-fcc

FundMe.test.js Error: invalid BigNumber value (argument="value", value={}, code=INVALID_ARGUMENT, version=bignumber/5.7.0) #135