Router creation won't work with docker and label

Traefik Traefik v2
6

The problem still exists. I removed the exposed ports and put the container in the same network. Nothing changes the behaviour.

This is the actual yml for the cryptpad compose.

version: '3.8'
services:
  cryptpad:
	image: "cryptpad/cryptpad:version-5.6.0"
	restart: unless-stopped
	container_name: cryptpad
	labels:
	  - traefik.enable=true
	  - traefik.http.routers.cryptpad.rule=Host(`office.intranet`, `sandbox.office.intranet`) && ClientIP(`192.168.0.0/16`)
	environment:
	  - CPAD_MAIN_DOMAIN=https://office.intranet
	  - CPAD_SANDBOX_DOMAIN=https://sandbox.office.intranet
	  - CPAD_CONF=/cryptpad/config/config.js
#      - CPAD_HTTP2_DISABLE=true
	volumes:
	  - /media/nfs/docker/cryptpad/data/blob:/cryptpad/blob
	  - /media/nfs/docker/cryptpad/data/block:/cryptpad/block
	  - /media/nfs/docker/cryptpad/customize:/cryptpad/customize
	  - /media/nfs/docker/cryptpad/data/data:/cryptpad/data
	  - /media/nfs/docker/cryptpad/data/files:/cryptpad/datastore
	  - /media/nfs/docker/cryptpad/config/config.js:/cryptpad/config/config.js

#    ulimits:
#      nofile:
#        soft: 1000000
#        hard: 1000000

networks:
  default:
	external: true
	name: traefik_proxy

Is there another thing what I can check?

Update:
I test this with a traefik/whoami service. This works. There must be a problem with the cryptpad specially. Could it be that the image (cryptpad) affected the behaviour of traefik labels?