I keep getting PreArm: Battery failsafe and PreArm: Throttle below Failsafe

I am trying to learn how to operate a drone using ardupilot. I have 0 knowledge about this.
I’ve have Mission Planner 1.3.74 with ArduCopter v4.0.7 and CubeOrange.

I keep getting two messages over and over again:

PreArm: Battery failsafe
PreArm: Throttle below Failsafe

I don’t know what these mean.
I’ve tried searching for what these mean but I keep getting redirected to something else: https://ardupilot.org/copter/docs/failsafe-battery.html

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Calibrate your rc and set up battery failsafe. But first follow this step by step: https://ardupilot.org/copter/docs/initial-setup.html

So what do the messages mean ?
I can’t find messages documented anywhere.
Or am I too stupid to understand them ?

Battery Failsafe means your battery voltage is below whatever minimum battery voltage you’ve got set.

Throttle below failsafe means the throttle value your receiver is sending to the flight controller is below the Throttle failsafe value and if you were flying this typically what you use to trigger a RTL.

What it suggests to me if you’re working on the bench, is you were powered up by USB and your radio isn’t turned on.