Gonna need info in order to troubleshoot your issue:
Are you running my plugin in VoiceAttack v1.16, or are you attempting to run it in VoiceAttack v2?
Have you used it before without issue, or is this your first use and it's producing this error?
Have you tried again since last night? Whisper Transcription errors can be produced by the API in some cases... even I get these errors (rarely) and I use this profile several times a day, every day. I just try again later, or immediately.
Let's start with these basic questions and move forward from there - you can also find me in my Discord server, I have a channel set up for support & troubleshooting my AVCS VoiceAttack profiles if you'd like a more direct back-and-forth troubleshooting:
https://discord.gg/xDJUjYQked