Include as many relevant details about the environment you experienced the problem in
* Version used (`icinga2 --version`):
* Operating System and version:
* Enabled features (`icinga2 feature list`):
* Icinga Web 2 version and modules (System - About):
* Config validation (`icinga2 daemon -C`):
* If you run multiple Icinga 2 instances, the `zones.conf` file (or `icinga2 object list --type Endpoint` and `icinga2 object list --type Zone`) from all affected nodes.