Interfacing two mpu6050 with arduino UNO

I have been trying to interface two mpu6050 with arduino.
At first i tried it with a leonardo board, then i tried it again on an UNO board.....but it shows the same error---

Error compiling for board Arduino/Genuino UNO (when I am using UNO board)

I have taken the code from this site

Please help how to debug this error

To debug the error, you have to:
a) know exactly what the error is
b) be able to see the code.

We're not doing well on either count.