I should note that Google Groups are reserved for general discussions about Google Cloud Platform-end products and not for reporting issues. So I recommend that you first double check the following tips which could be the cause of this issue:
Check your quota and justify it with the performance features of the the scaling type you have chosen.
Check to see if you have chosen the proper instance class.
If you couldn’t find the root cause or any justification about the issue, report it to the Issue Tracker and provide us more detail about how/when you get this error message and your redacted yaml file, so that we would be able to dig into the issue.