ill help narrow down the specific cause.

### Answer Based on community reports, "Failed to get LLM response - Internal Server Error" can occur in several scenarios: Common causes: 1. Component-level function calls - If you're using functions within components (rather than the main flow) , this can trigger the error [(1) ]() 2. State transitions - The error may occur when transitioning between states in multi-prompt agents [(2) ]() 3. LLM override issues - When overriding the response engine at call creation, missing the

version

parameter can cause failures [(3) ]() 4. Payload issues - Certain fields like

allow_user_dtmf

and

user_dtmf_options

have caused 500 errors when included in LLM creation payloads [(4) ]() Troubleshooting steps: - If using components, try moving your functions back to the main flow temporarily to isolate the issue [(1) ]() - When overriding LLMs via API, ensure you include the

version

field (typically

0

) [(3) ]() - Remove

allow_user_dtmf

and

user_dtmf_options

from your LLM creation payload if present [(4) ]() - Check the [Retell AI status page]() for platform-wide issues [(5) ]() Could you share your agent ID or provide more details about when the error occurs (during testing, state transitions, or API calls) ? This w

​ To learn more, see the sources I considered: [[1] components error:"Failed to get LLM responseError: Internal Server Error" in component L1](https://discord.com/channels/1186424376300679209/1428397581133807668) [[2] Internal Server Error](https://discord.com/channels/1186424376300679209/1417723616627527700) [[3] 'Failed to get from retell-stateful-llm-version'](https://discord.com/channels/1186424376300679209/1458482163371606158) [[4] Discord message from @adura21236_04775 on 2025-11-07](https://discord.com/channels/1186424376300679209/1186462578310910112/1436314256516583434) [[5] Discord message from @omar.13. on 2025-12-16](https://discord.com/channels/1186424376300679209/1186462578310910112/1450506247613972500) ​

Feel free to tag @AI Evy with additional questions. I also appreciate feedback, it helps me improve.