Error message "The username/password specified is not valid"

Thank you for the original question and the reply. I am facing also the same problem. A couple of weeks ago, we have changed the password of the shared library and kept on using it with the new password without any problem. Since yesterday, we re constantly receiveing error signals saying “the username/password specified is not valid”. I tried to login online as you suggested, but I get the same error, when I try to login online. I am pretty sure that the password is not changed in the meantime. I checked for updates and assured that we use the latest version. 

Thank you very much for your inputs in advance!

Best

Mert