Chat not working on strange Websocket error

Technical assistance
1

Infos:

  • Used Zammad version: 6.3.1-1723209690.7b187dbf.bookworm
  • Used Zammad installation type: debian source
  • Operating system: debian bookworm
  • Browser + version: firefox 115.14.0esr (64-Bit) and Chrome 127.0.6533.100 (Offizieller Build) (64-Bit)

Expected behavior:

  • show chat on buttonclick

Actual behavior:

Nothing happens.
When Inspecting Connections there is a Strange Error on Websocket:

[{“event”:“error”,“data”:{“error”:“undefined method `downcase’ for nil:NilClass”,“payload”:{“event”:“chat_status_customer”,“data”:{“session_id”:null,“url”:“https://ceneos.net/","chat_id”:2}}}}]

Steps to reproduce the behavior: