Hello @WO70 ,
Welcome to the community,
When did you try doing this? Was it when the app was under maintenance? Is it now working? If not, I would suggest ringing customer service, as it looks like it may need resetting, and you should then be able to log-in again.
To contact EE customer service dial 150 from your mobile phone or ring customer service for free using Skype or another phone: +44 800 079 8586 or +44 800 956 6000.
