RTFM:

Second argument (optional): space-delimited list of minor words that must always be lowercase except for the first word in the string. The JavaScript/CoffeeScript tests will pass undefined when this argument is unused.

(in python)
Think about the following declaration.

def title_case(*args):
# your code here

We should see your code to know, but I guess the element you're trying to turn into an int is a str or a special character. Check the index you have before the error jumps and its type.

First: please which language?
Seeing the language you use I supposed it is Python
I just tried a few solutions and all worked fine
You can see there is no error in the line you give
More than 1400 guys passed the Python kata as you could see at the top of the page
Maybe you should try again, sometimes CW has problems, I find it very very slow since some days. Good luck.

I'm getting an error within the test's code:

File "", line 11
a1 = [121, 144, 19, 161, 19, 144, 19, 11]
^
SyntaxError: invalid syntax

I'm having an error with the console; it's not inside my code:

Traceback:
in
in test
TypeError: title_case() missing 1 required positional argument: 'minor_words'

I've been getting this error when I test:

File "", line 10
test.describe("Premade tests: ")
^
SyntaxError: invalid syntax

The error is not even in my code. Anyone knows what causes this? I know my code works from running it on my pc, but the web console is not taking it.