I relized that there are aonother same topic like this but I did almost every instruction on there topic but I still cannot resolve it yet.
I did not update any firmware because of my herelink is old one that doesn’t has activation key.
I use BEC for supporting air unit with 9v separate from the other unit.
I did reset my GCS as well but still cannot resolve it.
I did flash air unit too.
Pls help me