I can add information that using a share on windows 10 as remote causes this error.
But using samba on linux with this config is ok:

[global]
  workgroup = BERG
  server string = ember
  security = user
  guest ok = no
  map to guest = Bad Password
  log file = /var/log/samba/%m.log
  max log size = 50
  printcap name = /dev/null
  load printers = no
  min protocol = SMB2
  ntlm auth = yes

[localNetwork]
  comment = Local Network Storage
  path = /mnt/storage/localNetwork
  browsable = yes
  read only = no
  guest ok = no
  valid users = local,john-arvid
  force group = samba
  force user = local