There are three possible reasons why that code might fail:
1. Geolocation information unavailable
If your device does not support GPS or does not have geolocation information, it cannot provide this information to the survey.
Browsers are usually hesitant about giving location information to websites. If you run this script in a browser, you will likely see a prompt asking whether or not you want the browser to give the website this information. If a respondent sees and refuses this prompt, no geolocation information will be recorded.
I don't believe this should be a factor for studies conducted on Offline Surveys on Android devices because the application already requires GPS permissions to install.
This state will trigger if the process of getting the geolocation information takes too long. As the original code's timeout is ten seconds, this seems like the least likely cause.
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