After upgrade from 18.04 to 20.04 Imonlcd stopped working

After each reset:

systemctl status LCDd.service
● LCDd.service - LCD display daemon
     Loaded: loaded (/lib/systemd/system/LCDd.service; enabled; vendor preset: enabled)
     Active: failed (Result: exit-code) since Fri 2020-11-27 12:38:14 CST; 37min ago
       Docs: man:LCDd(8)
             http://www.lcdproc.org/
    Process: 704 ExecStart=/usr/sbin/LCDd -s 1 -f -c /etc/LCDd.conf (code=exited, status=1/FAILURE)
   Main PID: 704 (code=exited, status=1/FAILURE)

Nov 27 12:38:14 frontend LCDd[704]: along with this program; if not, write to the Free Software Foundation,
Nov 27 12:38:14 frontend LCDd[704]: Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
Nov 27 12:38:14 frontend LCDd[704]: imonlcd: ERROR opening /dev/lcd-imon (No such file or directory).
Nov 27 12:38:14 frontend LCDd[704]: imonlcd: Did you load the iMON kernel module?
Nov 27 12:38:14 frontend LCDd[704]: Driver [imonlcd] init failed, return code -1
Nov 27 12:38:14 frontend LCDd[704]: Could not load driver imonlcd
Nov 27 12:38:14 frontend LCDd[704]: There is no output driver
Nov 27 12:38:14 frontend LCDd[704]: Critical error while initializing, abort.
Nov 27 12:38:14 frontend systemd[1]: LCDd.service: Main process exited, code=exited, status=1/FAILURE
Nov 27 12:38:14 frontend systemd[1]: LCDd.service: Failed with result 'exit-code'.

Then I perform /etc/init.d/LCDd restart
Restarting LCDd (via systemctl): LCDd.service.

And imonlcd display starts working:

systemctl status LCDd.service
● LCDd.service - LCD display daemon
     Loaded: loaded (/lib/systemd/system/LCDd.service; enabled; vendor preset: enabled)
     Active: active (running) since Fri 2020-11-27 13:17:25 CST; 49s ago
       Docs: man:LCDd(8)
             http://www.lcdproc.org/
   Main PID: 3721 (LCDd)
      Tasks: 1 (limit: 9319)
     Memory: 392.0K
     CGroup: /system.slice/LCDd.service
             └─3721 /usr/sbin/LCDd -s 1 -f -c /etc/LCDd.conf

Nov 27 13:17:25 frontend LCDd[3721]: modify it under the terms of the GNU General Public License
Nov 27 13:17:25 frontend LCDd[3721]: as published by the Free Software Foundation; either version 2
Nov 27 13:17:25 frontend LCDd[3721]: of the License, or (at your option) any later version.
Nov 27 13:17:25 frontend LCDd[3721]: This program is distributed in the hope that it will be useful,
Nov 27 13:17:25 frontend LCDd[3721]: but WITHOUT ANY WARRANTY; without even the implied warranty of
Nov 27 13:17:25 frontend LCDd[3721]: MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
Nov 27 13:17:25 frontend LCDd[3721]: GNU General Public License for more details.
Nov 27 13:17:25 frontend LCDd[3721]: You should have received a copy of the GNU General Public License
Nov 27 13:17:25 frontend LCDd[3721]: along with this program; if not, write to the Free Software Foundation,
Nov 27 13:17:25 frontend LCDd[3721]: Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.

ProblemType: Bug
DistroRelease: Ubuntu 20.04
Package: lcdproc 0.5.9-3
ProcVersionSignature: Ubuntu 5.4.0-54.60-generic 5.4.65
Uname: Linux 5.4.0-54-generic x86_64
NonfreeKernelModules: nvidia_modeset nvidia
ApportVersion: 2.20.11-0ubuntu27.13
Architecture: amd64
CasperMD5CheckResult: skip
CurrentDesktop: ubuntu:GNOME
Date: Fri Nov 27 13:10:30 2020
InstallationDate: Installed on 2019-09-26 (428 days ago)
InstallationMedia: Ubuntu 16.04.6 LTS "Xenial Xerus" - Release amd64 (20190227)
ProcEnviron:
 PATH=(custom, no user)
 XDG_RUNTIME_DIR=<set>
 LANG=en_US.UTF-8
 SHELL=/bin/bash
SourcePackage: lcdproc
UpgradeStatus: Upgraded to focal on 2020-09-29 (58 days ago)