title: AttributeError: 'NoneType' object has no attribute 'text' _ Beautifulsoup
body: <p>How should I extract text from the website? Below is the code I wrote for which attribute error displayed.</p>
  <pre><code>import requests
  from bs4 import BeautifulSoup
  page=requests.get('https://www.scopus.com/sourceid/21101016504')
  soup = BeautifulSoup(page.content, 'html.parser')
  ISSN = soup.find(id='issn').text
  print(ISSN)
  </code></pre>