Hello, I use the aktuell Octoprint version on a Raspberry pi 3.
Normal Camera and so on works fine.
Now tried to use my phone as Camera with the IP Camera App, the Stream is working perfect but if i try to use the Snapshot Url its not working.
The Pi and the phone are in the same network
Tried to restart it and use save mode, also not working.
i can open the url in the webbrowser
It is entirely possible that the app you use only supplies an mjpeg stream, and not jpeg snapshots. In that case it can not work for snapshots (or timelapses)
What (exact) app do you use, and what is the snapshot url you configured?