Getting a no access token error on the Spotify API using it flask

This is the error code https://api.spotify.com/v1/me/top/tracks?time_range=short_term&limit=10&offset=0:

None, reason: None

This is the code where the issue comes from:

@app.route('/top-songs')
def top_songs():
    token_info = get_token()
    if not token_info:
        return "Not work"

    print("Access Token:", token_info['access_token'])
    access_token = token_info['access_token']
    sp = spotipy.Spotify(auth=access_token)
    try:
        top_tracks = sp.current_user_top_tracks(limit=10, offset=0, time_range='short_term')['items']
    except spotipy.SpotifyException as e:
        print("Spotify API Error:", e)

    # Extract relevant information from top_tracks
    # Example: track_names = [track['name'] for track in top_tracks['items']]

    return render_template('index.html')

I am trying to print the top songs from the Spotify API and display it on a HTML file. The error seems to be coming up at the line:

top_tracks = sp.current_user_top_tracks(limit=10, offset=0, time_range='short_term')['items']

because I don't get the error if that is removed. Anyone have any idea?

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