Looks like the color sensor has come disconnected? Check Power, GND, and the I2C wires.
Depending on the sensor, you might need pullup resistors on SDA and SCL too.
@Gordon started
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Looks like the color sensor has come disconnected? Check Power, GND, and the I2C wires.
Depending on the sensor, you might need pullup resistors on SDA and SCL too.