BLE example don't work


I’m using the nRF51-DK with mbed os and I try to compile this example:

I use mbed studio and online compiler, but I run the example the serial monitor says:
“ failed: BLE_ERROR_NOT_IMPLEMENTED: Requested a feature that isn’t yet implement or isn’t supported by the HW”

I don’t why the serial monitor throw this error, due to the nRF51422 supports BLE.