Facing ValueError: signal only works in main thread

Using Streamlit
4

Hey, I figured that there might be a conflict in how trafilatura and streamlit handle thread management. Although this might be cheating I finally fixed it by changing the library with which I extract the text given the URL from trafilatura to newspaper3k. This is my executable code:

import streamlit as st
import validators
import requests
import trafilatura
from newspaper import Article

st.set_page_config(page_title="Demo")
URL = st.sidebar.text_input('put in url', "")
URL = URL.strip()
    
button_clicked = st.sidebar.button("🔍")

isValid = bool(validators.url(URL))

def fetch_url(url):
    article = Article(url)
    article.download()
    article.parse()
    return article

def extract_text_from_url(URL):
    resp = requests.get(URL)
    if resp.ok:
        article = ""
        fetched_article = fetch_url(URL)
        title = fetched_article.title
        article = fetched_article.text
        return article, title
    
    else:
        st.sidebar.error('This is not an URL. Put in valid URL.')
    
# MAIN-PAGE display
if button_clicked:
    if isValid:

        # TEXT EXTRACTION                
        article, title = extract_text_from_url(URL)      
            
    else:
        st.sidebar.error('This is not an URL. Put in valid URL.')