Hi can someone explain what the following error code mean and how i can recifty to download a copy of ebook purchase Error getting License. License Server Communication Problem: E_ACT_NOT_READY

Hi can any one help

I keep getting the following error code when I try and down a ebook which I have purchase

Error getting License. License Server Communication Problem:

E_ACT_NOT_READY

can someone advise me what this means and how I recifty the problem to enable me to read the ebook purchase?

Thanks