Can't access to the activation page after the installation finished

I have a problem with the activation of NC. The installation finished on a Rasp4. On the System run also Domoticz and Homebridge on the ports 8080 and 8088. When in try to open the activation page of Nextcoud with the browser ( I open only the Dashboard from Domoticz. Is there another way to open the activation page or get the first two passwords?