Hello
This is a well-known problem with the BT app on whatever platform you use.
It has been complained about and users are waiting for a fix from BT.
As I understand it, "fetching authorisation...." requests a popup and on some browsers (Chrome) you can see that a popup has been blocked.
In Chrome Settings>Privacy and Security>Popups and redirects, you can allow popups for My BT.
This does work and you can see your daily usage detail.
The bad news is that it only lasts for a couple of days before going back to its old ways. In Chrome, despite having popups allowed, you now get a blank page with About blank.
It's the same with Edge.
If you are a phone user, you probably want to use the app and not have the hassle of using a browser.
This is a poor show by BT and you should expect to be able to see your detailed usage, especially if going over your data allowance results in more charges.
If any other utility like gas, water or electricity took away your means of taking readings, they would soon be in trouble. BT are doing the same.
