Why fallback mode appears
If OpenAI returns a billing, credit, or quota error, DynexisAI cannot generate a live model response. The app then returns a local fallback draft so the workflow can still continue.
How to restore live AI
The OpenAI API account needs active billing or credits. After quota is available again, the same server-side routes can use the configured OpenAI key.
Security note
The OpenAI API key belongs in server-side environment variables only. It should never be placed in public browser code.