Hai, With out smb.conf we can not determin if this is a samba bug or a config error. Please provide the smb.conf or tell if we can close this report. i've only seen this "libnettle" message with a failty configuration (smb.conf) or with a mismatch in packages depends. Samba 4.4.5 isnt in debian anymore, so i suggest, close if smb.conf is not proviced. Greetz, Louis