Hi Dave,
I didn’t have to enable the camera, all worked fine for me.
When I connect to the camera and load the webpage I see a live view of the camera.
After I press start recording I see red squares on the image that indicate movement is detected and I presume picture is taken.
I can see and download the images from ‘View Pictures’ page.
I’ve connected with iPhone, iPad and mac to 2 different Raspberry Pis. The only bother I have is I have to try connecting to the WiFi a couple of times.
It might be worth trying a different device (but I doubt that). There is some code on github:
https://github.com/interactionresearchstudio/NaturewatchCameraServer
You could raise an issue there? I did contact
https://mynaturewatch.net/support/
by email with a question and got a very quick response.

I see there is a forum too.