how close I was to do this, my solution cannot be compared to this.

Yup, thank you for very quick responses :-)

OK. see your solution, issue resolved.

OK, this one fixed.
please retry(if JS version is not node v6.6.0, please change it)

Forget to say: change the JS version to node v6.6.0

OK, fixed, please try again ;-)
It's a CW upgrade issue.
same as another one, I'll fix another soon.

Please paste your code here, let me see what's happening ;-)
(Please mark it as having spoiler content)

My solution passes all 104 tests and it says "Congratulations, You pass the test!", but in the end of the output there is this error:

STDERR:
Error: unrecognized flag --trace-warnings
Try --help for options

Thus, the "Final Submit" button doesn't appear and I cannot submit it :-(

My solution passes all 107 tests and it says "Congratulations, You pass the test!", but in the end of the output there is this error:

STDERR:
Error: unrecognized flag --trace-warnings
Try --help for options

Thus, the "Final Submit" button doesn't appear and I cannot submit it :-(