Further details that may assist "the team". When I open the app there is a ~30 second delay where the app shows a bunch of rectangles with a left-to-right loading animation in them, after that it loads all the images and menu. I know my password and username is correct but I get the same error if I enter gibberish for the email/password so it doesn't appear to even be attempting to authenticate. All other apps on my phone work fine. My financial banking apps and an app I use for my employer all do checks for jailbreaks and they work fine.
I believe whatever the app does to look for a jailbreak, it's hitting false positives on some devices during that ~30 second delay in opening. If I can provide any other details to get "the team" to actually look at this bug and get it fixed for all of us it's affecting please let me know.
