'AttributeError: 'NoneType' object has no attribute 'text' _ Beautifulsoup

How should I extract text from the website? Below is the code I wrote for which attribute error displayed.

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)


Sources

This article follows the attribution requirements of Stack Overflow and is licensed under CC BY-SA 3.0.

Source: Stack Overflow

Solution Source