I am using Puppeteer to reach a button (unfollow button) in my GitHub following page. Because this button does not exist when I scrape this page I think it has been created by user-side JS code. Then I used waitForSelector command in order to wait for this button, but again page vould not find the button. Here is my code:

const test2=async()=>{
    let url='https://github.com/nariman?tab=following'
    await browserInit()
    await page.goto(url)
    await page.waitForSelector('input.btn')
    console.log('done')
}

and it will cause this error:

TimeoutError: Waiting for selector `input.btn` failed: Waiting failed: 30000ms exceeded

You could test it in your own GitHub page. Is there any solution?