Error in sist2-admin: search backend not found: None

[mviejo33]

Device Information (please complete the following information):

• OS: Ubuntu 22.04
• Deployment: Docker
• Browser (if relevant): chrome
• SIST2 Version: v3.1.1
• Elasticsearch Version 7.17.9

Command with arguments docker-compose file

version: "3"

services:
  elasticsearch:
    image: elasticsearch:7.17.9
    restart: unless-stopped
    environment:
      - "discovery.type=single-node"
      - "ES_JAVA_OPTS=-Xms1g -Xmx1g"
      - "ingest.geoip.downloader.enabled=false"
  sist2-admin:
    image: simon987/sist2:3.1.1-x64-linux
    restart: unless-stopped
    volumes:
      - ./sist2-admin-data/:/sist2-admin/
      - /:/host
    ports:
      - 4090:4090 # sist2
      - 8080:8080 # sist2-admin
    working_dir: /root/sist2-admin/
    entrypoint: python3 /root/sist2-admin/sist2_admin/app.py

Describe the bug Tried testing the tool via UI with a single pdf file. Scan passes with no errors, Index fails with no error (or any other line) visible on the UI. However, found 'Error while running task: search backend not found: None' error in server logs

Steps To Reproduce

1. Create a job that reads spanish and english ebooks
2. click on Index

Expected behavior Should see the pdf file in the generated UI

Actual Behavior I dont see the file listed in the corresponding UI

Screenshots

Index fails but no lines were logged