Serverless deploy to LocalStack fails: “Invalid character in header content [authorization]”

Running serverless deploy --stage local against LocalStack aborts during the “Resolving AWS account ID” step with the error:

Unable to find function cleanup on plugin Esbuild
Deploying "sls" to stage "local" (us-east-1)
Using serverless-localstack
Using serverless-localstack
serverless-localstack: Reconfigured endpoints

Error: Failed to resolve AWS account ID: Invalid character in header content ["authorization"]

deployment never reaches packaging or CloudFormation synthesis

serverless.ts

plugins: ['serverless-iam-roles-per-function', 'serverless-localstack'],

custom:
  localstack:
    stages: ['local']
    edgePort: 4566
    host: 'http://localhost'

provider:
  name: aws
  runtime: nodejs22.x
  environment:
    AWS_ENDPOINT_URL: 'http://localhost:4566'
    AWS_ACCESS_KEY_ID: '000000000001'
    AWS_ACCOUNT_ID: '000000000001'

docker-compose.yml

  s3mock:
    image: adobe/s3mock:latest
    environment:
      - retainFilesOnExit=true
      - root=root
    ports:
      - 9090:9090
    volumes:
      - ./uploadedFiles:/root

  localstack:
    container_name: localstack
    image: localstack/localstack
    ports:
      - 4566:4566
      - 4510-4559:4510-4559
    environment:
      - DEBUG=${DEBUG:-0}
      - SERVICES=lambda,sqs,sns
    volumes:
      - '${LOCALSTACK_VOLUME_DIR:-./volume}:/var/lib/localstack'
      - '/var/run/docker.sock:/var/run/docker.sock'

Versions

Tái hiện serverless deploy --stage local bằng serverless.ts và docker-compose.yml, tập trung vào bước “Resolving AWS account ID” và lỗi authorization-header. Kiểm tra các phiên bản Serverless Framework, serverless-localstack, LocalStack và Node.js được liệt kê. Được xem là hoàn tất khi quá trình deployment vượt qua bước phân giải tài khoản và tiếp tục đến packaging và tổng hợp CloudFormation mà không gặp lỗi invalid-header.