Antivirus scanner definition file update failed

I kept getting errors while executing command: 'systemctl status clamav-freshclam.service' ; see below

     root@Geldrop:~# systemctl status clamav-freshclam.service
     ● clamav-freshclam.service - ClamAV virus database updater
     Loaded: loaded (/lib/systemd/system/clamav-freshclam.service; static; vendor preset: disabled)
     Active: failed (Result: exit-code) since Wed 2020-12-23 14:33:45 CET; 15s ago
    Process: 6263 ExecStart=/usr/bin/freshclam --quiet (code=exited, status=1/FAILURE)
    Main PID: 6263 (code=exited, status=1/FAILURE)

    Dec 23 14:33:45 Geldrop systemd[1]: Starting ClamAV virus database updater...
    Dec 23 14:33:45 Geldrop freshclam[6263]: ClamAV update process started at Wed Dec 23 14:33:45 2020
    Dec 23 14:33:45 Geldrop freshclam[6263]: main.cvd is up to date (version: 59, sigs: 4564902, f-level: 60, builder: sigmgr)
    Dec 23 14:33:45 Geldrop freshclam[6263]: daily.cld is up to date (version: 26026, sigs: 4328586, f-level: 63, builder: raynman)
    Dec 23 14:33:45 Geldrop freshclam[6263]: bytecode.cvd is up to date (version: 331, sigs: 94, f-level: 63, builder: anvilleg)
    Dec 23 14:33:45 Geldrop systemd[1]: clamav-freshclam.service: Main process exited, code=exited, status=1/FAILURE
    Dec 23 14:33:45 Geldrop systemd[1]: Failed to start ClamAV virus database updater.
    Dec 23 14:33:45 Geldrop systemd[1]: clamav-freshclam.service: Unit entered failed state.
    Dec 23 14:33:45 Geldrop systemd[1]: clamav-freshclam.service: Failed with result 'exit-code'.

The following I did after reading the following web-page (https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=972974):
stopping clamav: 'systemctl stop clamav-daemon'

stopping clamav freshclam: 'systemctl stop clamav-freshclam'

adjusting member 'usr.bin.freshclam' in dir: /etc/apparmor.d ; adding 'capability dac_override,' and 'capability chown,'

          capability setgid,
          capability setuid,
          capability dac_override,
          capability chown,

removing all file from dir: '/var/lib/clamav' (bytecode ; daily ; main ; mirrors ; antivir)

starting clamav : 'systemctl start clamav-daemon'

starting clamav freshclam: 'systemctl start clamav-freshclam'

starting 'clamav freshclam' takes a while (about 2 minutes, I guess) and afterwards it looks like the normal databased-updater is working again.... lets see what happens the coming days...

regards