Stuck at Initalizing Nextcloud when using docker volume mapping

🚧 Installation
1

Hello there,

I try really hard to install Nextcloud via Docker and I try to follow the tutorials as good as I can. Right now I can’t run Nextcloud, because it gets stuck at initialization. However this only happens for Nextcloud when I map volumes. This only happens to Nextcloud. Mariadb runs fun. Here is the .yml that I use. Do you have any ideas on how to fix this? The paths are already added in dockers file sharing settings and the Nextcloud files get created though.

version: '2'

volumes:
  nextcloud:
  db:

services:
  db:
    image: mariadb
    restart: always
    command: --transaction-isolation=READ-COMMITTED --binlog-format=ROW
    volumes:
      - db:/var/lib/mysql
    environment:
      - MYSQL_ROOT_PASSWORD=AROOTPASSWORD
      - MYSQL_PASSWORD=APASSWORD
      - MYSQL_DATABASE=NEXTCLOUD
      - MYSQL_USER=NEXTCLOUD

  app:
    image: nextcloud
    restart: always
    ports:
      - 8080:80
    links:
      - db
    volumes:
      - E:\:/var/www/html
      - D:\:/mnt
    environment:
      - MYSQL_PASSWORD=APASSWORD
      - MYSQL_DATABASE=NEXTCLOUD
      - MYSQL_USER=NEXTCLOUD
      - MYSQL_HOST=db