I downloaded this app a few weeks ago, 11/28, and even with the new update I still cant log into this app; however, I can log into chrome or safari with the same username and password, and it works without any problems. By the way, reach out to them via Twitter @nordstrom to let them know theres an issue with the app. I sent them a message about it and hopefully they are still looking into it. For now, Im going to uninstall and use the browser.
SuzieQSewer about Nordstrom, v6.3