I understand your concern about reliability, especially with a project deadline. Based on the documentation, the "TypeError: t is null" is not listed as a common or expected error, and there is no public data on how often it occurs. For urgent help, the fastest support is via the [Vapi Discord #support channel](
https://discord.com/invite/pUFNcf2WmH), as this often gets quicker responses than email.
To help diagnose further:
Could you share what specific configuration changes or actions you made just before the error appeared? This will help narrow down possible causes.
If you need to escalate, please mention your deadline and error details in Discord for real-time assistance.
[Sources: Vapi Support Options, Vapi FAQ](
https://docs.vapi.ai/support)
Sources:
- [Vapi Support Options](
https://docs.vapi.ai/support)
- [Vapi Assistant Hooks & Community](
https://docs.vapi.ai/assistants/assistant-hooks)
- [Vapi FAQ](
https://docs.vapi.ai/faq)