This incident has been resolved.

A fix has been implemented and we are monitoring to ensure continued stability of this feature.

The cause of this issue has been identified and a fix is being implemented. We will provide an update in 2 hours.

Send Row is affected in both the web application and via requests made through the API. We are continuing to investigate this issue and will provide an update in 30 minutes.

A workaround has been identified: Choosing to include Comments in the Send Row will prevent the error from occurring. We will provide an update in the next 30 minutes.

We are investigating intermittent errors when using the Send Row feature in a sheet. If you experience this error please wait a moment and then try again. We will provide an update in the next 30 minutes.