NFS share not working

I followed this tutorial:

Now my seafile-server won’t start. I’m getting a “502 bad gateway error” of NGINX in my browser. My setup is like this:

Windows Server 2012 R2 - file server, I’m gonna store my seafile-data here.

Ubuntu 16.04.3 LTS - Seafile server, this is my main server.

I have a NFS share on the Windows machine which is accessible from the Ubuntu machine. I can access the share, my seafile-data is on it and I have made the symbolic link. What am I doing wrong?

Greetings and thanks in advance!

Edit: FIXED. Check your symbolic link. Mine was slightly different from the one in the server manual. Make sure it is blue and not red when you check it via ls -l.