Problem of App with real watch FR235

Hi All:

There is an App I already published (https://apps.garmin.com/es-ES/apps/3572b581-9896-4858-bc77-9f7763523b31), which when testing with the help of the simulator works fine, but it crashes on a real watch as one user recently showed me the bad behavior on a video (the app loads but when a button is pressed nothing happens). Having a look at the CIQ_LOG.TXT file, the only thing it shows is the following:

ERROR: Unhandled Exception
DETAILS:
STORE_ID: 3572b58198964858bc779f7763523b31
CALLSTACK:

No details, no callstack, so I have no clue about where to start. The only thing I can think of is a possible problem trying to get values from the App Store, but I already check if it exists or is null as at its first execution those values do not exist. Does any of you have a clue about where can I start or check?

Thanks,

Javier