Ensure that the EPM servers time is synchronized with a public NTP server. This is mandatory for communication with Google. Communication issues arise if there are time differences between Experience Portal and Google.
Ensure that the speech.google.com fully qualified domain name can be contacted from the MPP servers.
Ensure that there are no issues communicating with Google. Run the Google Cloud Speech sample application (provided by Google) on the MPP machine. This sample application is available at https://github.com/GoogleCloudPlatform/cpp-docs-samples/blob/master/speech/api/streaming_transcribe_singlethread.cc
