Unable to sign in to Feedback Assistant

I'm unable to sign in to Feedback Assistant on macOS. I have two Apple accounts and neither will sign in. I am able to sign in via the website. With the desktop app I'm getting a rather generic error message:

"Unable to sign in to Feedback Assistant Thank you for your patience. Please try again later."

This started this morning.

Unable to sign in to Feedback Assistant
 
 
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