Error while starting langflow

[Aryscode]

what is the error I am getting while starting the langflow? Below is the screenshot. can someone help me with this?
thanks in advance.

[alishanawer]

Based on the screenshot you shared, Langflow is mostly starting correctly, but there is an error at the end:

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Error Message:

[08/07/25 13:09:19] ERROR - service - Request error occurred

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Warnings:

You also have repeated NVIDIA API connection warnings:

WARNING - Failed to connect to NVIDIA API. Model list may be unavailable. Please check your internet connection and API credentials.

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What This Means:

1. Service Request Error

• This line is the actual error:

  ERROR - service - Request error occurred
  

  This likely refers to a backend request failing during the Langflow startup or initialization process.

2. NVIDIA API Warnings

• Langflow is trying to fetch available models or hardware info from NVIDIA, but it can't connect.

• Likely causes:

  • No internet connection.
  • Invalid or missing NVIDIA API key or credentials.
  • You're not using GPU / CUDA properly configured.

3. UI Loads, But Backend Has Issues

• The message:

  [OK] Open Langflow -> http://localhost:7860
  

  suggests the UI is running, but something on the backend (likely related to models or API) is not functioning correctly.

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Suggestions to Fix:

1. Check Internet Connection

   • Ensure your machine has access to the internet, especially if Langflow is trying to fetch remote models.

2. Check NVIDIA API Usage

   • Are you trying to use NVIDIA NGC or related features?

     • If yes: ensure your API key is correctly set via environment variables or config.
     • If not: consider disabling or ignoring these warnings if GPU isn’t required.

3. Inspect Logs Further

   • Enable more detailed logging (if supported) to get full traceback of the Request error occurred.

4. Open http://localhost:7860/ in Browser

   • See if Langflow UI loads.
   • If it loads, try interacting with it to see which part is broken (e.g., adding components, loading models).

5. Check for Required Environment Variables

   • Some Langflow setups require setting:

     DO_NOT_TRACK=true
     NVIDIA_API_KEY=your_key_here
     

6. Try Running Without GPU

   • If you don’t need GPU, consider running Langflow with CPU-only configuration by disabling GPU-related flags (varies based on setup).

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If you can share your environment (OS, how you installed Langflow, any config files you’re using), I can provide more targeted help.