Gps status doesn't change from "No Fix"


We are working on making a drone swarm. Our drone works perfectly, except for the gps. The status doesn’t change from “No Fix”. The gps has worked in the past but it stopped working while we didn’t change a thing. We are using Matek H743 fc and Matek M8Q gps. We can’t seem te find the problem.

Thanks in advance,

You do not post pictures or log files. How can we help???