Your code not working is not an issue. An issue is a bug in the kata. Please refer to the documentation: https://docs.codewars.com/training/troubleshooting/

Do you mean \"abc? It should be "abc.
Then \\\"abc would be \"abc.
But I check the random test. There is no double quote in it, so you don't need to worry about that.
Here is the test chars:
abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ1234567890~!@#$%^&*()_+-={}[]:'.,?<>`\\/

So, when I have string s ="/"abc" the correct answer would be 4 ("abc) or 5(/"abc) then?

If there is a double quote in it, that would be \".
I got the same problem with you. Because I use the console.log() to show something.
By the way, if you want to show some code. You should use triple ` not ' in Markdown.

I have such error after testing: https://freeimage.host/i/hzEJl1https://freeimage.host/i/hzEARs
and if link expired, here you have transcript:

'''

Testing for:

s = "+8j4R_gG41a0,jC9!yL7*v'\<8x}oyJxzE3560pH5FR=jSgpgs~2f=:?$%4sb_Z[a4DJCzW+~1ET3}0<#gb]LxK{*BYjVxPM)]]4H

expected 30 to equal 27

'''

so does it mean that the string itself has a double quote mark (") in it at the beginning?

in other examples theres opening and closing quotation mark, but now always (as above), so it's confusing...

in the string 'hchzvfrkmlnozjk' author suggest that answer should be 'chzvfrkmlno' (11 chars) but it can be also 'vfrkmlnozjk' (also 11 chars). I think that theres no other possibility to get longer substring...
so @R-N-Wata, theres no way to include 'j' and have more than 11chars

The description mention that division shoud round numbers down so there should be Math.floor(a/b) instead parseInt() in my opinion.