nRF52840 doesn't advertise

Hi

I am working on nrf52840, try to create a service,so i follow the tutorial, but i got a problem. The DK doesn't advertise, when I debug it, then it will jump into this place,as shown in picture.

Does anybody know what to do with this? Thanks in advance.

HW: nRF52840

SW: SDK_15.0.0

       Softdevice s140_nrf52_v6.0.0

Environment: MDK5, win10

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