Transmission Authentication Error

Sonarr version (exact version): 2.0.0.5322
Mono version (if Sonarr is not running on Windows): Not Sure
OS: Arch Linux (Docker Container: linuxserver/sonarr)
Debug logs: https://pastebin.com/UUWVfzfi
Description of issue: Receive the following message when attempting to connect to Transmission.

Here are the Docker-Compose entries

  sonarr:
    image: "linuxserver/sonarr"
    container_name: "sonarr"
    volumes:
      - ${USERDIR}/Docker/sonarr:/config
      - ${USERDIR}/Downloads/completed:/downloads
      - ${USERDIR}/media/tvshows:/tv
      - "/etc/localtime:/etc/localtime:ro"
      - ${USERDIR}/Docker/shared:/shared
    ports:
        - "9005:8989"
    restart: always
    environment:
      - PUID=${PUID}
      - PGID=${PGID}
      - TZ=${TZ}
  transmission:
    image: linuxserver/transmission
    container_name: transmission
    environment:
      - PUID=${PUID}
      - PGID=${PGID}
      - TZ=${TZ}
#      - TRANSMISSION_WEB_HOME=/combustion-release/ #optional
    volumes:
      - ${USERDIR}/Downloads:/watch
      - ${USERDIR}/Downloads/completed:/downloads
      - ${USERDIR}/Docker/transmission:/config
    ports:
      - "9002:9091"
      - "51413:51413"
      - 51413:51413/udp
    restart: unless-stopped

Sounds like Transmission’s web API/UI has a username and presumably a password set.

https://hub.docker.com/r/linuxserver/transmission/#securing-the-webui-with-a-usernamepassword

Thanks!

Setting a password in Transmission resolved the issue for me.