Gateway using Raspberry pi 3 model B

I am trying to setup a gateway in order to setup the MQTT broker. I recently got a raspberry pi model 3 b, followed the steps as mentioned in the gateway deployment guide. But my raspberry pi does not connect to the wifi when I upload the raspbian image provided by decawave. And then I tried to upload the new rasbian image provided on the raspberry pi website and the wpa supplicant file worked and the raspberry was connected to the wifi. I think the raspberry pi model 3 b is not correctly booting up with the raspbian image provided by decawave. Please suggest what to do