[Python] Why my script's working is inconsistent(sometimes output sometimes not)

I'm trying to fetch data from NSE India. This is my script how I tried but it's working is not consistent since few days. Earlier it was working well.Plz can anyone give me the idea how to fix this....

import requests
import pandas as pd
import time
import json

def create_session():
base_url = "https://www.nseindia.com"
headers = {'User-Agent': 'Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/91.0.4472.124 Safari/537.36', 'Accept': 'application/json, text/plain, */*', 'Accept-Language': 'en-US,en;q=0.5', 'Connection': 'keep-alive'}
session = requests.Session()
session.get(base_url, headers=headers, timeout=(60, 60))
return session, headers

def spurts_data(session, headers):
url = "https://www.nseindia.com/api/live-analysis-oi-spurts-underlyings"

try:
res = session.get(url, headers=headers, timeout=10)
res_data = res.json()
df_sp = pd.DataFrame(res_data['data'])
df_sp.columns = ['SYMBOL', 'LTSTOI', 'PREVOI', 'CHOI', '%CHOI', 'VOLUME', 'futValue', 'optValue', 'total', 'premValue', 'UDRLNG']
df_sp = df_sp[['SYMBOL', 'LTSTOI', 'CHOI', 'VOLUME', 'UDRLNG', '%CHOI']]

remove = ('BANKNIFTY', 'FINNIFTY', 'MIDCPNIFTY', 'NIFTY', '-', 'NIFTYNXT50')
df_sp = df_sp[~df_sp["SYMBOL"].isin(remove)].reset_index(drop=True)

return df_sp
except requests.exceptions.RequestException as e:
print(f"Error fetching spurts data: {e}")
return pd.DataFrame()

# Create session
session, headers = create_session()

# Get spurts data
df_sp = spurts_data(session, headers)

print(df_sp)

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