iPhone app not working

Hi
I Love this app and have been using it for a long time. Thank you for the great app.
Today I tried to log into the app and the app isn't working. I use the beta version. I updated the app a few days ago and the app was working fine. I did log in yesterday and today I was able to log into the website on my computer with my credentials. Thanks for a great app I hope to get it working again.
I included the error in a screen shot from my phone on the log in screen.

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