Here 3+ GPS is showing GPS No Fix in Mission Planner and LED Status is Radio Failsafe Activate

For last 3 to 4 days, I am trying to integrate my Here 3+ GPS with Cube Orange+. I have written and loaded all params carefully related to Here 3+. After connecting, I show GPS: No Fix. SatCount 0. PreArem: Radio Failsafe on.
I have tried it both indoors and outdoors on the rooftop of my house. How to sort out this thing?