Kimi K2 – Codex API 400 Error

[OPENAI-CODEX] Codex API error: Codex API request failed: 400
{“message”:“Codex API error: Codex API request failed: 400”,“modelId”:“gpt-5.3-codex”,“providerId”:“openai-codex”}

GitHub Copilot works fine in VS Code, so the issue is specific to Kimi K2.

Could you please help me resolve this issue?