timeout error robot=robot()

[sephile00]

Hello, I have a 4GB jetson nano, I installed jetpack 4.5 and the jetbot image by docker, I can enter the jupyterlab of jetbot, I put the waveshare expansion board cables to the i2c0 of the jetson (apparently the i2c1 of my jetson does not work very well, if someone knows how to fix it). When executing the code:
i2cdetect -y -r 0
I get the following output:
0 1 2 3 4 5 6 7 8 9 a b c d e f
00: -- -- -- -- -- -- -- -- -- -- -- -- --
10: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
20: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
30: -- -- -- -- -- -- -- -- -- -- -- -- 3c -- -- --
40: -- 41 -- -- -- -- -- -- -- -- -- -- -- -- -- --
50: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
60: 60 -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
70: 70 -- -- -- -- -- -- --

so if it detects devices connected on the i2c_0 pins 27 and 28

however, when executing the basic motion when creating the object robot=robot()
I get a timeout error , I have already changed the code in robot.py to read the i2c bus 0 ,

class Robot(SingletonConfigurable):

left_engine = traitlets.Instance(Engine)
right_engine = traitlets.Instance(Engine)


# config

#HERE I CHANGE DEFAULT_VALUE=0 INSTEAD 1

i2c_bus = traitlets.Integer(default_value=0).tag(config=True)
left_motor_channel = traitlets.Integer(default_value=1).tag(config=True)
left_motor_alpha = traitlets.Float(default_value=1.0).tag(config=True)
right_motor_channel = traitlets.Integer(default_value=2).tag(config=True)
right_motor_alpha = traitlets.Float(default_value=1.0).tag(config=True)

Could someone help me what am I doing wrong?