How to enable AT commands on P-NUCLEO-LRWAN3 sensor board

[ABell.5]

I am using P-NUCLEO-LRWAN3 and I have re programmed the sensor board (NUCLEO-L073RZ + LRWAN_NS1) using the STM32CubeExpansion_LRWAN_V2.1.0.

I am getting TxTimeout and JOIN FAILED and I can’t execute any AT commands?