YahooFantasyNFL App

The YahooFantasyNFL app almost never works for me. Most of the time I get an error message “ERROR Please check your league ID.” I definitely have the correct league ID inputted. Very rarely it will work and I don’t change anything when I do that other than sometimes I flip the options (show scores/show options/show projections) and that works 10% of the time but usually only a few seconds. Any advice or help on how to fix this would be appreciated.