XIAO BLE SENSE cannot communicate with IMU sensor

I was able to specifically install the “Seeed nRF52 mbed-enabled Boards” version 2.7.2, but I get the same error as Hardeep_Singh when I try to update it to 2.8.1 - it’s clear that something is broken in the Board JSON file provided by Seeed. I hope Seeed can see and fix this! @msfujino - the 2.8.1 version doesn’t install on the Arduino IDE (I use version 2.0.3, which is the current download).