You probably entered the OpenAI key in the wrong field, as the Azure key, or the Azure key field got modified by error and contains some non-empty value. Check the line that starts with "azureSpeechAPIKey". Set it to :
"azureSpeechAPIKey": "",
and then enter your open AI key in the line that starts with "openAiAPIKey".
If you did that and it still doesn't work, let me know.