Web Crawler help

[takaa]

Since today I have an issue. The BeautifulSoup is not showing all the HTML code of the requested page anymore. 

If i print 

print(soup)

I am not getting all the code that I see when I "Inspect source code" of the web page. Before today this was the same and i had no problem running my code. If i now run the code this is the result:

import requests
from bs4 import BeautifulSoup
import re
 
def fundaSpider(max_pages):
    page = 1
    while page <= max_pages:
        url = 'http://www.funda.nl/koop/rotterdam/p{}'.format(page)
        source_code = requests.get(url)
        plain_text = source_code.text
        soup = BeautifulSoup(plain_text, 'html.parser')
        ads = soup.find_all('li', {'class': 'search-result'})
 
        print(ads)
 
        page += 1
 
fundaSpider(1)

Output:
[]
 
Process finished with exit code 0

In my web browser I have no problem accessing the web page. Is it possible that the website is blocking the crawler, but not me as a person? Is there any way I can keep running the crawler? (just for the record, I use this crawler only for personal use and run it a few times per week).