Heart rate monitor demo APP can't connect to the nRF52 DK after programming process in nRF Connect for Desktop software

[General]

Dear Sir:

        I have a nRF52 DK. When I execute below programming process in nRF Connect for Desktop software, the Heart rate monitor demo APP can't connect to the nRF52 DK,
"the device does not have required services" message appears. How to solve the issue? thanks!!

[Simonr]

Hi

What device are you running this heart rate monitor app on? Can you show me the log in nRFConnect when you try connecting to this device?

Best regards,

Simon

[General]

Dear Sir:

           The Device is nRF52832. The error message is below picture.

Before I executed programming process in nRF Connect for Desktop software, the heart rate monitor app worked OK