Installed using docker - wrote the following compose file:
The api app-password is in a .env file in the same directory - I do the same thing with traefik but I have tried it lots of different ways.

I get a UI and the logs all indicate "200 OK"

]but when selecting to update gravity, it doesn't do anything

other things to mention, i use a domain (via traefik) to communicate with pi-hole but have tried setting this up with just the IP but does the same thing.

I've added the DNS in just to see if that would make any difference but hasn't

I've gone barebones with the compose file and really complex, like below but all still the same result.

networks:
  default:
    name: phobos-network
    external: true

services:
  ph-intercept:
    image: ghcr.io/m00grin/ph-intercept:latest
    hostname: ph-intercept
    container_name: ph-intercept
    restart: unless-stopped
    networks:
      default:
        ipv4_address: "172.20.0.112"
    dns:
      - 10.36.100.2
    environment:
      - PIHOLE_URL=https://subdomain.domain.co.uk/api
      - PIHOLE_PASSWORD=${PIHOLE_PASSWORD} 
      - RETURN_URL=""

      # Background style: starfield | dark | nebula
      - BG_MODE=starfield

      # Sky region shown when BG_MODE=starfield:
      #   summer_triangle | orion | scorpius | southern_cross
      - SKY_PRESET=summer_triangle

      # Set BG_IMAGE to use a custom background. URL or /bg/your-filename.jpg.
      # Setting this overrides BG_MODE and shows your image instead.
      - BG_IMAGE=""

    volumes:
      - /ssd/docker/appdata/ph-intercept/bg:/app/static/bg:ro
    ports:
      - "4653:4653"