Icingaweb2 not reachable


the icingaweb2 is not reachable, although it is running on the server with the apache and icinga2. I already have all the prerequisites, that are documented on the official site set up. However, when accessing the icingaweb2 site on apache (https://hostname/icingaweb2/setup) I get a 404 server error

the link (https://hostname/) works and shows the default site of apache

  • Icinga Web 2 version: 2.10.1
  • brave (chromium-based)
  • Apache Version: Apache/2.4.41
  • Icinga 2 version used: r2.13.3-1
  • PHP version used: PHP 8.1.6
  • Server operating system and version: Ubuntu 20.04.4 LTS