Failed to retrieve the samba package

I seem to have the same problem in order to go from samba 3 to samba 4. The patch fixed the firmware upgrade, and I was able to get onto 18.2-patch 3. How can I switch to samba 4?
cat /etc/patch_log
ls -l /etc/patch18-2-03
plugout check && echo $?
root@fvdwsl-base:/ # cat /etc/patch_log
[2018-01-01 12:56:14] unzip|unzip fvdw-sl 18.2 2big2 /fvdw-sl-18.2-lang-sp-03aug2021.zip(fvdw-sl-18.2-lan-sp-03aug2021.tar) OK
root@fvdwsl-base:/ # ls -l /etc/patch18-2-03
ls: /etc/patch18-2-03: No such file or directory
root@fvdwsl-base:/ # plugout check && echo $?
0
root@fvdwsl-base:/ # ls /etc | grep patch
fvdwversionpatched
patch_log