v0.7x is > 2 years old; ancient and buggy. You should update to the latest Stratux version, and because your version is so old it'll require a reflash of the SD card (find instructions via a Google search). I had the same issue long ago where I would not get wx data, but traffic was fine. After much trial and error, I discovered that the SD card was nearly full. I was able to delete the Stratux log files in flight and the issue was promptly resolved. In your case, reflashing to the latest Stratux version will get you up to date and clean the SD card, too.