Azure DevOps - Receiving status code 400 during server connection re-authentication

Upon my connection to Azure DevOps expiring/being marked by the app as "needs configuration", I attempt to review and fix by configuring the existing connection. Upon re-authenticating, I receive a status code 400:

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Looks like there’s a problem with this site

https://service.catlight.io/api/oauth/ReceiveVstsAuthorizationCode4?code=[redacted]&state=[redacted] sent back an error.

Error code: 400 Bad Request

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I have also tried to delete the connection from the desktop app and re-add it, but I encounter the same issue.

Report id: 34414