Activation Server error code E_ADEPT_SIGNIN_CONNECTION_EXCEPTION

I'm trying to set up Adobe Digital Editions for my grandmother but when i try to activated an Overdrive id with the program, i keep the Activation Server error code: E_ADEPT_SIGNIN_CONNECTION_EXCEPTION. i've searched for fixes, nothing i can find about the error code. If you have had to deal with this error please let me know how to fix it.