Evernote in Samsung Galaxy Note Authentication Error. I encountered the Authentication Error problem in Samsung Galaxy Note. The device cannot sync with the changes on the PC. I power off the device and turned off the Internet connection and restated them again. Again I noted that the device still showed Authentication Error. Then suddenly a new downloaded screen appeared on the Samsung Galaxy Note. Then I realized that I had changed my Evernote password on the PC !!! Entered the new password on the device and everything was OK.