Suggestion:
Since the "voice circuits overloaded" error persists and the PlayHT "Ruby" voice is missing, please contact Vapi Support directly with your issue details and screenshots. You can reach them at [Vapi Support](
https://docs.vapi.ai/support). This will help the team investigate and resolve the problem with your assistant's voice configuration.
Source:
- [Vapi Support](
https://docs.vapi.ai/support)