I just finished installing Icinga2 (working fine) and Icingaweb2, and tried to go to the /icingaweb2/setup page and all I get is this:
/*! Icinga Web 2 | © 2014 Icinga Development Team | GPLv2+ */
require_once ‘/usr/share/php/Icinga/Application/webrouter.php’; "
Icinga Web 2 version: 2.8.2-1
Browser: Brave, Firefox, and Chrome
Icinga2 version: r2.12.3-1
php version: 7.4.3
Server OS/Distro: Ubuntu Server 20.04
I followed the directions from the site as closely as possible, and yes “libapache2-mod-php” was manually installed.