Uable to obtain publishers list

Hi
I used the following code yesterday and got the full pub list. Today I get 404 error. Please advise why this is no longer working

def get_all_publishers(access_token):
response = requests.get(
PUBLISHERS_URL,
headers={'Authorization': f'Bearer {access_token}'}
)
response.raise_for_status()
return response.json()

Getting this
HTTPError: 404 Client Error: Not Found for url: https://backstage.taboola.com/backstage/api/1.0/1794763/allowed-publishers