Failed to download file from S3 bucket

[BrianLe188]

I'm coding a project using s3 to store file pdf and use langchain to connect and load files.
This is my code:
const loader = new S3Loader({
bucket: process.env.BUCKET,
key: filekey, // example: test/e3959622-7fb1-44ab-a506.pdf
s3Config: { accessKeyId: process.env.S3_ACCESS_KEY, secretAccessKey: process.env.S3_SECRET_KEY, region: "us-east-1" }, unstructuredAPIURL: "http://localhost:8000/general/v0/general", // confusing
});

when uploading files to s3, everything is good. But, when I try to call my API to handle for feature, I get this error: Failed to download file test/e3959622-7fb1-44ab-a506.pdf from S3 bucket.

Please, explain to me. Thanks