dc motor control mpu6050

help me
In file included from N20BalanceBotR1.ino:56:0:
C:\Program Files (x86)\Arduino\libraries\I2Cdev/I2Cdev.h:37:20: fatal error: em_cmu.h: No such file or directory
#include <em_cmu.h>
compilation terminated.
Error compiling.

help me how do balance robot ?

To use that line of code you have to install the library that contains the em_cmu.h file and re-start the IDE.