Leeson 6: solidiy-coverage error: TypeError [ERR_INVALID_URL]: Invalid URL

[KarthickSakthi]

`TypeError [ERR_INVALID_URL]: Invalid URL

HardhatPluginError: TypeError [ERR_INVALID_URL]: Invalid URL
    at SimpleTaskDefinition.action (/workspace/hardhat-simple-storage/node_modules/solidity-coverage/plugins/hardhat.plugin.js:274:35)
    at Environment._runTaskDefinition (/workspace/hardhat-simple-storage/node_modules/hardhat/src/internal/core/runtime-environment.ts:330:14)
    at Environment.run (/workspace/hardhat-simple-storage/node_modules/hardhat/src/internal/core/runtime-environment.ts:163:14)
    at main (/workspace/hardhat-simple-storage/node_modules/hardhat/src/internal/cli/cli.ts:277:7)`

My hardhat.config.js:

require("@nomicfoundation/hardhat-toolbox");
require("@nomicfoundation/hardhat-verify")
require("dotenv").config();
require("./task/block-number");
require("hardhat-gas-reporter");
require("solidity-coverage");

/** @type import('hardhat/config').HardhatUserConfig */
module.exports = {
  solidity: "0.8.9",
  defaultNetwork: "hardhat",
  networks:{
    mumbai: {
      url: "", 
      chainId: 80001, 
      accounts: [""],
    }
  },
  etherscan:{
    apiKey: ""
  },
  gasReporter:{
    enabled:false,
    outputFile:"gas-report.txt",
    noColors:true,
    currency:"USD",
    coinmarketcap:"",
    token:"MATIC"
  }
};

My Package.json

`{
  "name": "hardhat-simple-storage",
  "version": "1.0.0",
  "description": "",
  "main": "index.js",
  "scripts": {
    "test": "echo \"Error: no test specified\" && exit 1"
  },
  "author": "",
  "license": "MIT",
  "devDependencies": {
    "@nomicfoundation/hardhat-toolbox": "^3.0.0",
    "@nomicfoundation/hardhat-verify": "^1.0.3",
    "chai": "^4.3.10",
    "dotenv": "^16.3.1",
    "hardhat": "^2.15.0",
    "hardhat-gas-reporter": "^1.0.9",
    "solidity-coverage": "^0.8.5"
  }
}
`

I tried this command:

npx hardhat coverage --testfiles "test/*.js"

Kindly help on this!