Description of the bug:

Running this same script with a previously function API key results in
{ "error": { "code": 400, "message": "Request contains an invalid argument.", "status": "INVALID_ARGUMENT" } }

I have records of proper results from my code using the API before ~9:02 AM today. My next attempt at using this same API occurred at 1:54PM and returned this error. In attempting to figure out what happened, I resorted to trying this sample script which I'd based my processing on. It is now returning this same error.

Actual vs expected behavior:

A proper response from the test query.

Any other information you'd like to share?

This API key is still functional; other (text-only, no upload) prompt give appropriate results.