Buried Echos

Hi everyone, does anyone know what I’m doing wrong?

I recently tried to start Buried Echoes. I activated the antenna at Forsaken Airfield and picked up the radio. I managed to find a cache full of flares, but now I’m at the exact location where the cache to start Buried Echoes should be, and my radio isn’t picking up any signal. I’ve loaded my save , closed and reopened the game, and even went back to Idle Camp, but nothing works :(

What else can I do? I really don’t want to lose my progress or have to go all the way around Forsaken Airfield again, I got lost in the cave for like 2 days haha