Zhihu cleanup script - unfollow

questions.js

// This script saves all followed question urls and titles in a hashmap => data.json
// { "url":"title", "url":"title", ...}

const puppeteer = require('puppeteer');
var fs = require('fs');

(async () => {
    const browser = await puppeteer.launch({headless: false})
    const page = await browser.newPage()
    const pagenum = 25 // This is the number of pages + 1
    // const screenshot = 'blah.png';
    var data = {}

    await page.goto('https://www.zhihu.com/')
    await page.setViewport({
            width: 1280,
            height: 600
    }) // Make screen bigger so that loginButton is visible

    let loginButton = `button.Button.HomeSidebar-signBannerButton.Button--blue.Button--spread`
    await page.click(loginButton)

    // This one is a bit flaky, but ceebs with tuning, TBC
    page
        .waitForSelector('[name="username"]')
        .then()

    await page.type('[name="username"]', process.env.ZHIHU_USER)
    await page.type('[name="password"]', process.env.ZHIHU_PASS)
    // Click it manually if Zhihu prompts user-computer check
    const signinButton = `button.Button.SignFlow-submitButton.Button--primary.Button--blue`
    await page.click(signinButton)
    await page.waitForNavigation()

    for (var i = 1; i < pagenum; i++) {
        await page.goto('https://www.zhihu.com/people/username/following/questions?page=' + i)
        let pg = await page.evaluate((data) => {
            let dt = {}
            let temp = document.getElementsByClassName("QuestionItem-title")
            for (var t of temp)
                dt[t.children[0].href] = t.children[0].innerHTML
            return dt
        })
        data = Object.assign(pg,data)
    }

    fs.writeFile('./data.json', JSON.stringify(data), 'utf-8', (err) => {
        if (err) throw err;
        console.log('The file has been saved!')
    })

    // await page.screenshot({ path: screenshot })
    await browser.close()
})()

unfollow.js

// Created this script to automatically unfollow questions on Zhihu
// As all the following activities are displayed to public and that's bad for privacy.

const puppeteer = require('puppeteer');
var fs = require('fs');

(async () => {
    const browser = await puppeteer.launch({headless: false})
    const page = await browser.newPage()
    
    // List of button selectors
    const loginButton = `button.Button.HomeSidebar-signBannerButton.Button--blue.Button--spread`
    const unfollowButton = `button.Button.FollowButton.Button--primary.Button--grey`
    
    // data.json contains { url:question, url:question, ...}, this is pre-generated from questions.js
    var urlObj = JSON.parse(fs.readFileSync('./data.json', 'utf8'))
 
    await page.goto('https://www.zhihu.com/')
    await page.setViewport({
            width: 1280,
            height: 600
    })

    await page.click(loginButton)
    
    page
        .waitForSelector('[name="username"]')
        .then()
    
    await page.type('[name="username"]', process.env.ZHIHU_USER)
    await page.type('[name="password"]', process.env.ZHIHU_PASS)
  
    // Manually click login button as Zhihu detects automated click
    // const signinButton = `button.Button.SignFlow-submitButton.Button--primary.Button--blue`
    // await page.click(signinButton)
    // await page.waitForNavigation()
    await page.waitFor(10000);
    
    
    var count = 1
    for (var u in urlObj) {
        console.log(u)
        await page.goto(u)
        await page.click(unfollowButton)
        if (count == 1) {
            // Zhihu also pops up for 2FA when it detects automated click for the first time after login
            // Wait for a minute to complete 2FA
            await page.waitFor(60000);
            count = 0
        }
    }

    await browser.close()
})()

运行node questions.js时报以下错误：

(node:81986) UnhandledPromiseRejectionWarning: Unhandled promise rejection (rejection id: 2): TypeError: text is not iterable
(node:81986) [DEP0018] DeprecationWarning: Unhandled promise rejections are deprecated. In the future, promise rejections that are not handled will terminate the Node.js process with a non-zero exit code.

问下这个怎么解决呢？