Hi Alexander,

On 7 Apr 2019, at 2.02, alexander.2003@... wrote:

[00:00:00.011,352] <err> settings: set-value failure. key: bt error(-2)

I don’t know if this is the cause of your issue, but it implies that you have something in flash (the storage partition) that the application doesn’t expect. Before investigating further I’d suggest trying to erase the entire flash and then reflashing your app.

Johan