BUG: Single-provider run fails when only OpenAI/Google key is set

[Chesars]

Repro:

1. Set OPENAI_API_KEY (or GOOGLE_API_KEY). No Anthropic key..
2. In Settings, select an OpenAI Model (or Google) for all roles.
3. Run.

Expected:
– The run completes using only the selected provider.

Actual
– The run either throws or falls back to other providers:
• “All fallback models exhausted for task router. Last error: No API key found for provider: google-genai…”
• “Unknown users must provide API keys to use the Open SWE demo application…”
• “All fallback models exhausted for task summarizer. Last error: [GoogleGenerativeAI Error]: Failed to parse stream”

Related: #709, #777, #715

[avijitsf1996]

+1

[pigon224]

i have the same issue...

[gauravsharmaer]

i have same issue too i tried both open ai or gemini keys