docker-compose path mapping on Linux

I have this run configuration:

(I've read on the Jetbrains documentation somewhere that path mappings on Linux need to be done manually for now.)

With these path mappings:

This matches my docker-compose.yml

version: '3'
services:

  # Main application
  app:
    restart: always
    build:
      context: ./containers/app/
      args:
        - SSH_PRIVATE_KEY
    env_file:
      - ./config/env/files/app.env
    volumes:
      - ./containers/app/bin/:/app/bin/
      - ./containers/app/src/:/app/code/src/
      - ./containers/app/config/:/app/config/
      - ./containers/app/config/postfix/main.cf:/etc/postfix/main.cf
      - ./.git/:/app/.git/
      - ./logs/app/:/app/logs/
      # the line below mounts the XXXX repository at /lib for development.
      # this should be commented out on any environment except dev
      - ./containers/app/lib/:/app/code/lib/
      - app_data:/app/data/
    depends_on:
      - postgres

  # Main database server
  postgres:
    build: ./containers/postgres/
    restart: unless-stopped
    env_file:
      - ./config/env/files/postgres.env
    volumes:
      - postgres_data:/var/lib/postgresql/data
    ports:
      - 5432:5432

  # Nginx -> app uwsgi
  nginx:
    build:
      context: ./containers/nginx/
      args:
        - SSH_PRIVATE_KEY
    restart: unless-stopped
    env_file:
      - ./config/env/files/nginx.env
    ports:
      - ${PORT}:80
    volumes:
      - ./containers/nginx/bin/:/app/bin/
      - ./containers/nginx/config/:/app/config/
      - ./logs/nginx/nginx/:/var/log/nginx/
      - app_data:/srv/data
    depends_on:
      - app

volumes:
  postgres_data:
  app_data:

However, when I debug the configuration, I get this error:

What exactly "can't be found"? The remote or local path? The paths in the error message are mapped.

On PyCharm Pro 2020.2, Ubuntu 20.04 LTS