Thanks for the reply Carolyn. When I tap "Settings," there is no icon for NY Times app listed under "Apps" in left hand column. Am I supposed to see an icon there?
In any event, last night, after doing a reset of all settings, I deleted app from ipad as well as my desktop, then re-downloaded the app from App Store. I then logged back in to NY Times and now it seems to work, although I'm noticing a lot of the photos don't seem to be downloading.
Also, for some reason, after doing a new install of this app, initially you only see "Top News" in the list of "Sections." After a considerable delay, the full list of Sections eventually appears. This is yet another annoying feature of this app -- they give you no indication of what is going on behind the scenes and the user is left to assume that the app is not working properly. Apparently there is some built-in delay between the log in and the NY Times server giving you full access to all sections.
I never have any trouble with WSJ or Wash Post apps. With NY Times, it's always something. And they seem to show no interest whatsoever in responding to users with technical issues.