Lesson 4 - withdraw function in FundMe.sol reverting

[Focalized]

I'm able to fund the contract with the correct calculated value in Wei, but when I go to withdraw the funds back out. The function takes some time to think, then gives me a Gas Estimation Failed: Gas estimation errored with the following message (see below). The transaction execution will likely fail. Do you want to force sending?
gas required exceeds allowance (29970705)

I thought this was an address issue for funds only, when I enter the same amount of Wei back in the Value field, it still gives me the error for withdraw.

// SPDX-License-Identifier: MIT

pragma solidity ^0.8.8;

import "./PriceConverter.sol";

contract FundMe {
    using PriceConverter for uint256;

    uint256 public minimumUsd = 50 * 1e18; // Divide x amount of USD by current price of ETH

    address[] public funders;
    mapping(address => uint256) public addressToAmountFunded;

    address public owner;

    constructor() {
        owner = msg.sender;
    }

    function fund() public payable {
                    // Want to be able to set a minimum fund amount in USD
                    // 1. How do we send eth to this contract?
                    // To get the value of how much someone is sending msg.value
                    // 1e18 = 1 * 10 ** 18 == 1000000000000000000
                    require(msg.value.getConversionRate() >= minimumUsd, "Didn't send enough!"); 
                    funders.push(msg.sender);
                    addressToAmountFunded[msg.sender] = msg.value;


                    // Reverting undos any action before and sends any remaining gas back
    }
    

    
    
    
     function withdraw() public onlyOwner {
         // for(/* starting index, ending index, step amount */)
                            // 0, 10, 2
        for(uint256 funderIndex = 0; funderIndex < funders.length; funderIndex = funderIndex++){
            // code
          address funder = funders[funderIndex];
          addressToAmountFunded[funder] = 0;
        }

        // resetting array
        funders = new address[](0);
        (bool callSuccess,) = payable(msg.sender).call{value: address(this).balance}("");
        require(callSuccess, "Call failed");
     }

     modifier onlyOwner {
         require(msg.sender == owner, "Sender is not owner");
         _;
     }
}

[Focalized]

Also get this error:

Gas estimation errored with the following message (see below). The transaction execution will likely fail. Do you want to force sending?
err: insufficient funds for gas * price + value: address 0x09Cc01dEB17F12e4aa93dC13dff5AcFaa8429289 have 56421272646531384 want 2900000000000000000 (supplied gas 15010499)

[ghost]

Check your ETH balance, I think this is saying you don't have enough ETH

[Focalized]

I didn't include "payable" in my withdraw function. Fixed it!

[PatrickAlphaC]

Please remember to use 3 backticks and the javascript language tag for formatting solidity. Thanks!