Samba access from RP not working anymore / smbclient works

Direct connection between the both.

As I just realized that I really got a new Samba version which is based on 4.5, this led me to this thread:

Applied the changes, but still no luck, log says no instead ‘Permission denied’:
unix_err:‘6f’ error : ‘Connection refused’

Tried mounting via fstab, but as well no luck, when trying to enter the mount in /mnt/x i get:
-bash: cd: movies/: No such device