Stopping does not mean crashing.
Since the app supposedly takes a photo every hour for days, a timer must have been used, which as of Android 6 does not remain active for several days, but is ended very soon by Doze Mode, unless you use a KeepScreenOn method, a foreground service and / or the device is continuously connected to a charging cable.
Which error?
As I already mentioned in my first post: How to ask a question (open new topic)
