RB 1100 AHx4 - arm - does not back up

Dear,
I recently installed a RB1100AHx4 in place of a CCR1016-12G because it burned.
It had a backup script:
But now it does not work on RB1100AHx4
RB 1100 Ahx4
Version 6.42.6
Firmware - 6.41.3
What am I doing wrong?
Thanks

#Script

ftp configuration

:local ftphost "xxx.xxx.xxx.xxx"
:local ftpuser "login"
:local ftppassword "password"
:local ftppath "bkp"

months array

:local months ("jan","feb","mar","apr","may","jun","jul","aug","sep","oct","nov","dec");

get time

:local ts [/system clock get time]
:set ts ([:pick $ts 0 2].[:pick $ts 3 5].[:pick $ts 6 8])

get Date

:local ds [/system clock get date]

convert name of month to number

:local month [ :pick $ds 0 3 ];
:local mm ([ :find $months $month -1 ] + 1);
:if ($mm < 10) do={ :set mm ("0" . $mm); }

set $ds to format YYYY-MM-DD

:set ds ([:pick $ds 7 11] . $mm . [:pick $ds 4 6])

file name for user manager backup - file name will be UMDB-servername-date-time.umb

:local fname (.[/system identity get name]."-".$ds."-".$ts.".umb")

file name for system backup - file name will be UMDB-servername-date-time.backup

:local fname1 (.[/system identity get name]."-".$ds."-".$ts.".backup")

file name for config export - file name will be UMDB-servername-date-time.rsc

:local fname2 (.[/system identity get name]."-".$ds."-".$ts.".rsc")

backup the data

/tool user-manager database save name=$fname
:log info message="User manager backup finished (1/3).";
/system backup save name=$fname1
:log info message="System backup finished (2/3).";
/export compact file=$fname2
:log info message="Config export finished (3/3)."

upload the user manager backup

:log info message="Uploading user manager backup (1/3)."
/tool fetch address="$ftphost" src-path=$fname user="$ftpuser" mode=ftp password="$ftppassword" dst-path="$ftppath/$fname" upload=yes

upload the system backup

:log info message="Uploading system backup (2/3)."
/tool fetch address="$ftphost" src-path=$fname1 user="$ftpuser" mode=ftp password="$ftppassword" dst-path="$ftppath/$fname1" upload=yes

upload the config export

:log info message="Uploading config export (3/3)."
/tool fetch address="$ftphost" src-path=$fname2 user="$ftpuser" mode=ftp password="$ftppassword" dst-path="$ftppath/$fname2" upload=yes

delay time to finish the upload - increase it if your backup file is big

#:delay 60s;

find file name start with UMDB- then remove

#:foreach i in=[/file find] do={ :if ([:typeof [:find [/file get $i name] "UMDB-"]]!="nil") do={/file remove $i}; }
#:log info message="Configuration backup finished.";