An Azure communication platform for deploying applications across devices and platforms.
400 again and now also a 404 on $value. The portal is definitively broken on your end — this isn't my data, my browser, or my submission. Microsoft's TFV submission API is returning errors.
Network diagnostics tab shows the submit call returning 400 AND a $value call returning 404. That 404 is likely the portal trying to fetch something that doesn't exist in your backend — a Microsoft-side bug.