Authentik OIDC - Internal Server Error

homarr:
    container_name: homarr
    image: ghcr.io/ajnart/homarr:0.15.3
    volumes:
      - ${CONTAINER_FOLDER}/homarr/configs:/data/configs
      - ${CONTAINER_FOLDER}/homarr/icons:/app/public/icons
      - ${CONTAINER_FOLDER}/homarr/data:/data
      - ${CONTAINER_FOLDER}/graphics:/app/public/graphics
    ports:
      - '7575:7575'
    environment:
      - AUTH_PROVIDER=oidc
      - BASE_URL="admin.domain.tld"
      - NEXTAUTH_URL="admin.domain.tld"
      - AUTH_OIDC_URI="https://auth.domain.tld/application/o/homarr" # Have also tried admin. here instead of auth.
      - AUTH_OIDC_CLIENT_ID="ID"
      - AUTH_OIDC_CLIENT_SECRET="SECRET"
      - AUTH_OIDC_CLIENT_NAME="AUTHENTIK"
      - AUTH_OIDC_ADMIN_GROUP="authentik Admin"
      - AUTH_OIDC_OWNER_GROUP="authentik Admin" 
      - AUTH_OIDC_AUTO_LOGIN=true
    networks:
      - frontend
    restart: unless-stopped

❌ Invalid environment variables: { NEXTAUTH_URL: [ 'Invalid url' ], AUTH_OIDC_URI: [ 'Invalid url' ] }
❌ Invalid environment variables: { NEXTAUTH_URL: [ 'Invalid url' ], AUTH_OIDC_URI: [ 'Invalid url' ] }

Error: connect ECONNREFUSED IP:36703
    at TCPConnectWrap.afterConnect [as oncomplete] (node:net:1571:16) {
  errno: -111,
  code: 'ECONNREFUSED',
  syscall: 'connect',
  address: 'IP',
  port: 36703
}