NRF528540 with MPU9255 Problem

Hello guys, i currently applying the example about MPU9255 following this:GitHub - Martinsbl/nrf5-mpu-examples

i'm using the app_mpu.c, app_mpu.h, mpu9255_register_map.h, nrf_drv_mpu.h, nrf_drv_mpu_twi.c to create new project with the main.c and sdk config in nrf5-mpu-simple. 

when i build and log showing this error. Could anyone help me with this, many thank,

Kyle. 

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