Problems with data fields

Hello, 

We just bought my mother a Garmin Lily. I have been adjusting her watch and I'm having trouble with the data fields. When it is on walking mode the only data field that appears is the clock. And when I try to change it the watch restarts itself. Changing the data fields of walking mode on the app has no effects. I even removed the data field clock and when I tried to do a walking activity the watch restarted itself. 

It is very weird.

Has anyone had this problem?