Public bug reported: Focal only supports the PHP version 7.4. The version 2.7.3-1 of icingaweb2 availabe in focal apparently does not support PHP 7.4. According to this bug, PHP 7.4 is only supported with >= 2.8.0:
https://github.com/Icinga/icingaweb2/issues/4009 As the error message shown when visiting icingaweb2 is characteristic of the PHP 7.4 incompatibility, I assume that this is not specific to my environment (i.e. PHP 7.4 support has not been ported to 2.7.3.1 in Ubuntu): Uncaught ErrorException: include(): \Icinga\Web\ViewStream::stream_set_option is not implemented! Expected behaviour: icingaweb2 shows login page Observed behaviour: exception stack trace is shown Environment: Description: Ubuntu 20.04.1 LTS Release: 20.04 ** Affects: icingaweb2 (Ubuntu) Importance: Undecided Status: New -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1890182 Title: Incompatibility of icingaweb2 2.7.3-1 (focal) with PHP 7.4 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/icingaweb2/+bug/1890182/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs