LANGFLOW black screen on launch
nguyenlykhanhlinh opened this issue · comments
help me this error:
I tried install langflow follow step-by-step in doc langflow and I also tried fixing the error according to the GitHub link provided ([https://github.com//issues/2090]) but when i run cmd, screen still completely black.
Does anyone know how to fix this issue? If you could help, I would be very grateful. Thank you so much.
Hello @nguyenlykhanhlinh! I'm here to assist you with any bugs, questions, or contributions.
To resolve the ModuleNotFoundError
for langflow.components.vectorstores.Couchbase
and the black screen issue, follow these steps:
-
Install Necessary Dependencies:
Ensure you have installed the required dependencies, specificallycouchbase
andlangchain_community
. You can install them using the following command:pip install couchbase langchain_community
-
Check Version Requirements:
Make sure you are using the correct version of thecouchbase
package. The required version is^4.2.1
:pip install couchbase==4.2.1
-
Verify Imports:
Ensure that theCouchbaseComponent
is correctly imported in your__init__.py
file within thevectorstores
directory. The relevant section should look like this:from .Couchbase import CouchbaseComponent __all__ = [ "CouchbaseComponent", # other components ]
-
Enable Detailed Logging:
Enable detailed logging to diagnose the black screen issue. Set the environment variableLANGFLOW_LOG_LEVEL
toDEBUG
:export LANGFLOW_LOG_LEVEL=DEBUG
Alternatively, configure logging in your code:
from pathlib import Path from langflow.utils.logger import configure configure(log_level="DEBUG", log_file=Path("/path/to/your/logfile.log"))
-
Check
debounce
Function:
Thedebounce
function error might be due to incorrect imports or missing definitions. EnsureSAVE_DEBOUNCE_TIME
is correctly imported and has a valid numeric value. Verify thathandleUpdateValues
is a valid function and is correctly passed todebounce
. Here is the relevant code snippet:import { debounce } from "lodash"; import { SAVE_DEBOUNCE_TIME } from "../constants/constants"; import { postCustomComponentUpdate } from "../controllers/API"; import { NodeDataType } from "../types/flow"; export const handleUpdateValues = async (name: string, data: NodeDataType) => { const code = data.node?.template?.code?.value; if (!code) { console.error("Code not found in the template"); return; } const template = data.node?.template; if (!template) { console.error("No template found in the node."); return; } try { const res = await postCustomComponentUpdate( code, template, name, data.node?.template[name]?.value ); if (res.status === 200 && data.node?.template) { return res.data.template; } } catch (error) { console.error("Error occurred while updating the node:", error); throw error; } }; export const debouncedHandleUpdateValues = debounce( handleUpdateValues, SAVE_DEBOUNCE_TIME );
-
Check Environment Variables:
Ensure all necessary environment variables are set. Here are some key variables:VARIABLES_TO_GET_FROM_ENVIRONMENT = [ "OPENAI_API_KEY", "ANTHROPIC_API_KEY", "GOOGLE_API_KEY", "AZURE_OPENAI_API_KEY", "AZURE_OPENAI_API_VERSION", "AZURE_OPENAI_API_INSTANCE_NAME", "AZURE_OPENAI_API_DEPLOYMENT_NAME", "AZURE_OPENAI_API_EMBEDDINGS_DEPLOYMENT_NAME", "ASTRA_DB_APPLICATION_TOKEN", "ASTRA_DB_API_ENDPOINT", "COHERE_API_KEY", "HUGGINGFACEHUB_API_TOKEN", "SEARCHAPI_API_KEY", "SERPAPI_API_KEY", "VECTARA_CUSTOMER_ID", "VECTARA_CORPUS_ID", "VECTARA_API_KEY", ]
By following these steps, you should be able to resolve the ModuleNotFoundError
and the black screen issue in Langflow [1][2][3][4][5][6][7][8][9][10].
This issue should not occur again after version 1.0.