Description
An error occurred with the micro:bit's magnetometer component.
Resolution
Check the micro:bit for any physical damage, ie a missing component. If this is the case, contact the reseller from which you purchased the micro:bit and ask about their replacement process or open a support ticket including a photograph of the front and rear of the device, the DETAILS.TXT file from the micro:bit and any information about the device and editor you are using to program it.