I2C writeByte failed with error kFsckErrUnknown?

I'm trying to use i2c.writeByte to send basic commands to a BlinkM I2C controlled LED. I know the BlinkM works fine because I tested it with my Arduino. No problem with I2C communication on the Arduino. But when I try to configure the device using a Kinoma Create, I get this error. Has anyone seen this before? Unfortunately the error message is very vague and I have no idea how to begin troubleshooting this.

/fsk/kinoma/kpr/extensions/pins/sources/i2c.c:137: # Exception: writeByte: I2C writeByte failed with error kFskErrUnknown (Address 0x9, SDA pin 53, CLK pin 54).!


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