I'm in BBQ mode on the app of my ISC-007BW when I toggle the app to on, it goes to "on" for 2 seconds and then turns back "off". What am I doing wrong?

I’m in BBQ mode on the app of my ISC-007BW when I toggle the app to on, it goes to “on” for 2 seconds and then turns back “off”. What am I doing wrong?

Hello,
Please check if the probe is plugged in? Is the time function set?
If not, please insert the probe and set the time function, does it work?