I have installed ADE 4.5 on my Tablet running Android 5.0. Software installs OK.
Authorization with my Adobe ID: OK.
Downloading an eBook: OK.
When I open the eBook, I got the Error E_ACT_NOT_READY.
Canceling the authorization is not working too: Error Message "authorization can not be
deleted Try again later."
I have seen, there are more People wich have the same Problem.
I also tried to contact the Adobe Support, but there I can't get help for Android Systems (only MAC and Windows). The supporter told me to put my Question again into the Forum. Here it is.
I hope that one of the developers of ADE 4.5 can say under what circumstances the error E_ACT_NOT_READY occurs and how to overcome these circumstances.
Now I found the solution of this Problem myself:
And now it works.