The Problem
Sometimes you cannot make an observation. You click Add Observation type (e.g., animal sighting), but nothing happens.
The Cause
The main reason is that your phone does not yet have a valid GPS location.
The Solution
Make sure your Location settings are correct:
Go to Settings → Location → Use location = ON.
Check whether Cluey has a GPS fix:
Menu → Settings & Account → Current location.
If this field is empty, you do not yet have a valid GPS location. Walk outside and wait until it appears.
Alternatively, you can press the map to manually pinpoint the location of your observation. In this case, everything will work as normal.
For more information about GPS on your phone, see this article.