@jeremypsl Same problem here. I have some E1 Pro and the first officially lack the web interface, but I noticed the option in my recent one when activating onvif (as it is deactived by default since some time). I activated and get the same error.
If there is no web interface why the hack is nginx installed as a webserver. That does not make sense. Other observations: crying detection is not visible and configurable yet in the app only. My NVR RLN36 still lacks the crying detection support although the rln8-410 already has it.