Error found "Internal Errors 0x4000" in Mid flight

Cube Autopilot
1
I am encountering the error message “Internal Errors 0x4000” during mid-flight, and after landing it shows:

“PreArm: Internal errors 0x4000 l:215 spi_fail.”

What is the root cause of this SPI failure error?

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2

First try updating to latest stable firmware, 4.6.3 at this time, and see if the error persists.
Do you have any devices connected to an SPI connector?

3

Hi @xfacta
We have locked and validated ArduPilot firmware version v4.5.0 in our GCS, and we are not using any external SPI devices in the current setup.