Anita:
This can be really difficult to solve in a forum as we would require some specific knowledge on what hardware and network operating systems you have along with which versions of Adagio you have installed.
It's odd that you are getting a login error trying to print preview a report. These normally occur when you initially open Adagio.
If your Adagio is on a server then one possibility is that your workstations has disconnected from the server.
Did you recently upgrade to Ledger and BankRec v9.2?
You may want to contact your Adagio consultant for assistance.
One trick to clearing errors