package:rt4-fcgi:(not installed)
Setting up rt4-fcgi (4.4.3-2) ...
Job for rt4-fcgi.service failed because the control process exited with error code.
See "systemctl status rt4-fcgi.service" and "journalctl -xe" for details.
invoke-rc.d: initscript rt4-fcgi, action "start" failed.
● rt4-fcgi.service - request-tracker4 FastCGI daemon
     Loaded: loaded (/lib/systemd/system/rt4-fcgi.service; disabled; vendor preset: enabled)
     Active: activating (auto-restart) (Result: exit-code) since Wed 2020-09-09 10:12:34 CEST; 6ms ago
    Process: 82729 ExecStart=/usr/bin/spawn-fcgi -F ${workers} -d / -u www-data -g www-data -s /var/run/rt4-fcgi.sock -P /var/run/rt4-fcgi.pid -- /usr/share/request-tracker4/libexec/rt-server.fcgi (code=exited, status=2)

Sep 09 10:12:34 loki-desktop rt4-fcgi[82729]: spawn-fcgi: child spawned successfully: PID: 82747
Sep 09 10:12:34 loki-desktop systemd[1]: rt4-fcgi.service: Control process exited, code=exited, status=2/INVALIDARGUMENT
Sep 09 10:12:34 loki-desktop systemd[1]: rt4-fcgi.service: Failed with result 'exit-code'.
Sep 09 10:12:34 loki-desktop systemd[1]: Failed to start request-tracker4 FastCGI daemon.
dpkg: error processing package rt4-fcgi (--configure):
 installed rt4-fcgi package post-installation script subprocess returned error exit status 1