webmin: Webmin does not start immediately after installing package on Raspberry Pi OS 64-bit . systemd service file not created until reboot .

I am unable to start webmin RaspiOS Bullseye 64-bit . Here is the OS information. I’m running on a Pi4B with 8GB, FYI.

root@pi64:/home/pi# !cat
cat /etc/os-release 
PRETTY_NAME="Debian GNU/Linux 11 (bullseye)"
NAME="Debian GNU/Linux"
VERSION_ID="11"
VERSION="11 (bullseye)"
VERSION_CODENAME=bullseye
ID=debian
HOME_URL="https://www.debian.org/"
SUPPORT_URL="https://www.debian.org/support"
BUG_REPORT_URL="https://bugs.debian.org/"

When I install, I get the following error

root@pi64:/home/pi# apt -y install ./webmin_1.990_all.deb 
Reading package lists... Done
Building dependency tree... Done
Reading state information... Done
Note, selecting 'webmin' instead of './webmin_1.990_all.deb'
The following NEW packages will be installed:
  webmin
0 upgraded, 1 newly installed, 0 to remove and 0 not upgraded.
After this operation, 302 MB of additional disk space will be used.
Get:1 /home/pi/webmin_1.990_all.deb webmin all 1.990 [28.3 MB]
Selecting previously unselected package webmin.
(Reading database ... 126347 files and directories currently installed.)
Preparing to unpack /home/pi/webmin_1.990_all.deb ...
Unpacking webmin (1.990) ...
Setting up webmin (1.990) ...
Webmin install complete. You can now login to https://pi64:10000/
as root with your root password, or as any user who can use sudo
to run commands as root.
W: Repository is broken: webmin:arm64 (= 1.990) has no Size information

telnet shows that there is no daemon listening on port 10000 .

Where is the log that shows where the problem might be ?

Has anyone succeeded installing webmin on this OS version ?