Lesson15 verify issues, Nothing to compile NomicLabsHardhatPluginError & Connect Timeout Error

[EightMilesZhangjx]

I encounter the issues while I run the command "yarn hardhat deploy --network goerli", I tried many times to resolve it but failed. I hope if somebody can find the reason. I have reset the VPN but seems failed again:
File<hardhat.config.js>:

require("@nomiclabs/hardhat-waffle")
require("hardhat-gas-reporter")
require("@nomiclabs/hardhat-etherscan")
require("dotenv").config()
require("solidity-coverage")
require("hardhat-deploy")
// You need to export an object to set up your config
// Go to https://hardhat.org/config/ to learn more
/**
 * @type import('hardhat/config').HardhatUserConfig
 */

const COINMARKETCAP_API_KEY = process.env.COINMARKETCAP_API_KEY || ""
const GOERLI_RPC_URL =
    process.env.GOERLI_RPC_URL || "https://eth-goerli.alchemyapi.io/v2/your-api-key"
const PRIVATE_KEY = process.env.PRIVATE_KEY || ""
const ETHERSCAN_API_KEY = process.env.ETHERSCAN_API_KEY || ""

module.exports = {
    defaultNetwork: "hardhat",
    networks: {
        hardhat: {
            chainId: 31337,
            // gasPrice: 130000000000,
        },
        goerli: {
            url: GOERLI_RPC_URL,
            accounts: [PRIVATE_KEY],
            chainId: 5,
            blockConfirmations: 6,
        },
        /** 
        mainnet: {
            url: process.env.MAINNET_RPC_URL,
            accounts: [PRIVATE_KEY],
            chainId: 1,
            blockConfirmations: 6,
        },*/
    },
    solidity: {
        compilers: [
            {
                version: "0.8.8",
            },
            {
                version: "0.6.6",
            },
        ],
    },
    etherscan: {
        apiKey: ETHERSCAN_API_KEY,
    },
    gasReporter: {
        enabled: true,
        currency: "USD",
        outputFile: "gas-report.txt",
        noColors: true,
        // coinmarketcap: COINMARKETCAP_API_KEY,
    },
    namedAccounts: {
        deployer: {
            default: 0, // here this will by default take the first account as deployer
            1: 0, // similarly on mainnet it will take the first account as deployer. Note though that depending on how hardhat network are configured, the account 0 on one network can be different than on another
        },
    },
    mocha: {
        timeout: 200000, // 200 seconds max for running tests
    },
}

File<helper-hardhat-config.js> :

const networkConfig = {
    31337: {
        name: "localhost",
        ethUsdPriceFeed: "0x9326BFA02ADD2366b30bacB125260Af641031331",
        gasLane: "0xd89b2bf150e3b9e13446986e571fb9cab24b13cea0a43ea20a6049a85cc807cc", // 30 gwei
        mintFee: "100000000", // 0.01 ETH
        callbackGasLimit: "5000000", // 500,000 gas
    },
    // Price Feed Address, values can be obtained at https://docs.chain.link/docs/reference-contracts
    5: {
        name: "goerli",
        ethUsdPriceFeed: "0xD4a33860578De61DBAbDc8BFdb98FD742fA7028e",
        vrfCoordinatorV2: "0x2Ca8E0C643bDe4C2E08ab1fA0da3401AdAD7734D",
        gasLane: "0x79d3d8832d904592c0bf9818b621522c988bb8b0c05cdc3b15aea1b6e8db0c15",
        callbackGasLimit: "5000000", // 500,000 gas
        mintFee: "100000000", // 0.01 ETH
        subscriptionId: "1002", // add your ID here!
    },
}

const DECIMALS = "18"
const INITIAL_PRICE = "200000000000000000000"
const developmentChains = ["hardhat", "localhost"]

module.exports = {
    networkConfig,
    developmentChains,
    DECIMALS,
    INITIAL_PRICE,
}

File<01-deploy-nft-marketplace.js>:

const { network } = require("hardhat")
const { developmentChains, VERIFICATION_BLOCK_CONFIRMATIONS } = require("../helper-hardhat-config")
const { verify } = require("../utils/verify")

module.exports = async ({ getNamedAccounts, deployments }) => {
    const { deploy, log } = deployments
    const { deployer } = await getNamedAccounts()
    const waitBlockConfirmations = developmentChains.includes(network.name)
        ? 1
        : VERIFICATION_BLOCK_CONFIRMATIONS

    log("----------------------------------------------------")
    const arguments = []
    const nftMarketplace = await deploy("NftMarketPlace", {
        from: deployer,
        args: arguments,
        log: true,
        waitConfirmations: waitBlockConfirmations,
    })

    // Verify the deployment
    if (!developmentChains.includes(network.name) && process.env.ETHERSCAN_API_KEY) {
        log("Verifying...")
        await verify(nftMarketplace.address, arguments)
    }
    log("----------------------------------------------------")
}

module.exports.tags = ["all", "nftmarketplace"]`
<Files:02-deploy-basec-nft.js> `const { network } = require("hardhat")
const { developmentChains, VERIFICATION_BLOCK_CONFIRMATIONS } = require("../helper-hardhat-config")
const { verify } = require("../utils/verify")

module.exports = async ({ getNamedAccounts, deployments }) => {
    const { deploy, log } = deployments
    const { deployer } = await getNamedAccounts()
    const waitBlockConfirmations = developmentChains.includes(network.name)
        ? 1
        : VERIFICATION_BLOCK_CONFIRMATIONS

    log("----------------------------------------------------")
    const arguments = []
    const nftMarketplace = await deploy("NftMarketPlace", {
        from: deployer,
        args: arguments,
        log: true,
        waitConfirmations: waitBlockConfirmations,
    })

    // Verify the deployment
    if (!developmentChains.includes(network.name) && process.env.ETHERSCAN_API_KEY) {
        log("Verifying...")
        await verify(nftMarketplace.address, arguments)
    }
    log("----------------------------------------------------")
}

module.exports.tags = ["all", "nftmarketplace"]

[EightMilesZhangjx]

https://github.com/EightMilesZhangjx/Sales-platform

[alymurtazamemon]

@EightMilesZhangjx Try it after some time and make sure your internet connection is stable.

[EightMilesZhangjx]

OK ,thank you anyway.