getting error while doing fuzz testing in the DeFi project

[5h3rl0ckH0lm3s]

I am writing the code for the DeFi protocol alongside watching Advanced Foundry course by Patrick. I am facing a problem in the 19th video of this course on Cyfrin Updraft while writing the open invariant fuzz test invariant_protocolMustHaveMoreValueThanTotalSupply.
Following is the code of OpenInvariantsTest.t.sol:

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.18;

// Have our Invariant aka properties

// What are our invariants ?

// 1. The total supply of DSC should be less than the total value of collateral
// 2. Getter view functions should never revert <- evergreen invariant

import {Test, console} from "forge-std/Test.sol";
import {StdInvariant} from "forge-std/StdInvariant.sol";
import {DeployDSC} from "../../script/DeployDSC.s.sol";
import {DSCEngine} from "../../src/DSCEngine.sol";
import {DecentralizedStableCoin} from "../../src/DecentralizedStableCoin.sol";
import {HelperConfig} from "../../script/helperConfig.s.sol";
import {IERC20} from "@openzeppelin/contracts/token/ERC20/IERC20.sol";

contract OpenInvariantsTest is StdInvariant, Test {
    DeployDSC deployer;
    DSCEngine engine;
    DecentralizedStableCoin dsc;
    HelperConfig config;
    address weth;
    address wbtc;

    function setUp() external{
        deployer = new DeployDSC();
        (dsc, engine, config) = deployer.run(); 
        (,,weth, wbtc,) = config.activeNetworkConfig();
        targetContract(address(engine));
    }

    function invariant_protocolMustHaveMoreValueThanTotalSupply() public view{
        // get the value of all the collateral in the protocol
        // compare it to all the debt (dsc)
        uint256 totalSupply = dsc.totalSupply();
        uint256 totalWethDeposited = IERC20(weth).balanceOf(address(engine));
        uint256 totalWbtcDeposited = IERC20(wbtc).balanceOf(address(engine));
        uint256 wethValue = engine.getUsdValue(weth, totalWethDeposited);
        uint256 wbtcValue = engine.getUsdValue(wbtc, totalWbtcDeposited);

        assert(wbtcValue + wethValue > totalSupply);
    }
}

On running the command forge test --match-test invariant_protocolMustHaveMoreValueThanTotalSupply , I am getting the below error:

Please help me in debugging this.

[ShaneOxM]

I encountered this error as well with fuzz testing. Requires some refactoring in the src contracts, along with adjustments to the fuzz test files.

I would direct you to my repository, updated as of yesterday for reference in your refactoring:

Foundry-Defi-Stablecoin-Updated

[EngrPips]

You are welcome, Friend. Keep crushing it.

[YavorJJ]

Found the mistake. Your HelperConfig differs a little from mine in the sequencing of the output variables of the NetworkConfig view function. This was causing the EvmError. Now the test runs as desired. But still, I cannot find any bug in my previous script and it is still giving the previous errors. Nonetheless now I can use your script and move ahead in the project. Thank you very much @EngrPips and @ShaneOxM for helping.

Yo I really need your help here bro, what exactly you changed in your NetworkConfig and what did you do to fix your problem. I am really stuck here. Thank you

[EngrPips]

I will check this as soon as I can. I have not gotten the time to look through it.

[YavorJJ]

Found the mistake. Your HelperConfig differs a little from mine in the sequencing of the output variables of the NetworkConfig view function. This was causing the EvmError. Now the test runs as desired. But still, I cannot find any bug in my previous script and it is still giving the previous errors. Nonetheless now I can use your script and move ahead in the project.

i figured it out, messed up the equal sign

[EngrPips]

Awesome. Keep crushing it. Friend.