Previously Functioning API Call Now Returning Failing HTTP status: 400

Team ID: https://go.glideapps.com/o/vawcSzYTNEhZuG82mhaE

App ID: https://go.glideapps.com/app/umbVFQsorwQeuVW3AcGz/layout

Description
I have an API call (adding new rows to another glide table) that is part of a workflow. It has been running without any problems since inception. All of a sudden, it’s erroring out and I can’t figure out why. Could this be a bug or more of a me-specific issue?

What error does it show for you?