Ardupilot error in pre armed

Hi.hello I have a problem with the Mission Planner Pre-Arm Hardware Safety Switch. What is the solution to the problem?

First explain the problem in more detail.

What are you expecting?
What is happening instead?

According to the Pre-Arm Safety Checks Documentation this might be what you are looking for:

Message Cause Solution
Hardware safety switch Hardware safety switch has not been pushed Push safety switch (normally on top of GPS) or disable by setting BRD_SAFETY_DEFLT to zero and reboot autopilot