Image Scraper (beautifulsoup), stopped working, need to help see why

[snippsat]

Can show a example and i use my code
Here use concurrent.futures

import requests
from bs4 import BeautifulSoup
from os import path
import concurrent.futures

def read_url(url):
    headers = {'User-Agent': 'Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/86.0.4240.75 Safari/537.36'}
    response = requests.get(url, headers=headers)
    soup = BeautifulSoup(response.content, 'lxml')
    img_all = soup.select('div.thread_image_box > a')
    return img_all

def img_multi(img_link):
    print(f'Download --> {path.basename(img_link)}')
    with open(path.basename(img_link), 'wb') as f_out:
        f_out.write(requests.get(img_link).content)

if __name__ == '__main__':
    url = 'https://archive.4plebs.org/hr/thread/2866456/'
    img_all = read_url(url)
    # ThreadPoolExecutor | ProcessPoolExecutor
    with concurrent.futures.ThreadPoolExecutor(max_workers=8) as executor:
        for img in img_all:
            img_link = img.get('href')
            executor.submit(img_multi, img_link)