I have about 6 different database connections setup for multiple documents. The queries are set to refresh hourly and I've never had any issues until today. All of my documents started throwing this error
"Error: Connection to undefined database undefined at undefined failed with user undefined from ip 220.127.116.11 Connection URL uses an unsupported JDBC protocol."
I logged out of my connections and set them back up again and they all connected successfully. But when i refresh my queries, I continue to get these errors. Nothing has changed on our servers, databases, etc. So I'm not sure why the tool started erroring all of a sudden for no reason.
Sorry you are having issues - it's a problem on our side and we have a fix pending publish with Google to address it. We will update you when it is available.
The fix was just deployed into production - please close and re-open the sheet and verify the issue is now resolved.