can't control Raspbot motors: write_array I2C error

[MeqdadDev]

Hi dears at Yahboom,
I've faced this problem with more than one Raspbot kit, since I'm conducting a TOT sessions for STEM teachers using Raspbot.
(All other kits are working fine, but this error appeared with a few kits)

The problem is when the teacher come to control the motors on Raspbot, it gives this error continuously:

After different tests on the code and wiring connections, nothing changed. (Maybe MCU is defected? not sure.)

Any suggestions to overcome this issue? (I'm looking for software-oriented solution)