“Unchecked runtime.lastError: Native host has exited.”
Interesting. This means the xmodule file is installed ok, but it crashes when kantu makes the test call - this is the first time I hear about this error 
OS and Chrome in Japanese… this could be the issue, at least it seems this is the only thing different on your machine and mine. => If you find out more, please let us know. Later I will also do some tests myself.
Question:
Does this happen for the RealUser and the ComputerVision XModule?