After installing integrator and browsing to it by hostname, I get the following error:
Unable to initialise application. Failed to validate config: data/jitsi_domain must match format "hostname", data/jitsi_domain must be equal to constant, data/jitsi_domain must match a schema in anyOf
Add the following line to your <config-dir>/integrator/integrator.yml file:
Replacing meet.element.io with whatever Jitsi host you would like to use.
There is a bug in this installer which specifies https:// in front of the default domain and this causes the error. This will be fixed in a future installer.