Holybro - Pixhawk4 mini QGC do not arm motors

Hi guys, good morning everybody!
I need help for my first multirotor. I bought a Holybro QAV250 kit with Pixhawk4 mini. I mount all stuffs but i can not arm the motors. QGC ask me safaty switch (not assign in order to use radio gesture : throttle down+right) and GPS error (but i have green light on the GPS that set).
Other issue is related to QCG that can not calibrate esc and battery (battery full but it say battery too low!?) . Someone can help me? :slight_smile:

The safety switch is located on the GPS receiver, press it and you should be able to arm. Make sure your battery settings are correct in QGC.

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