add user

sudo smbpasswd -a USER
sudo smbpasswd -e USER

set up share path

/etc/samba/smb.conf

[USER]
        comment = USER home
        path = /home/USER
        writeable = yes
        public=yes
        browseable = yes
        create mode = 776
        force directory mode = 776

restart samba service

sudo systemctl restart smbd.service
sudo systemctl restart nmbd.service

if still can't access, then check below config

/etc/samba/smb.conf

[global]
   hosts allow = #add your IP here

restart samba service again, it should work now.