What did I do wrong?

Question

What does this error mean?
https://imgur.com/a/DS05nie

The HTML code has this:
<img id="cookie" src="image link" onclick="cookie(1)"></img>

And the javascript code has this:
var cookies = 0;
function cookie(cantidad) {
cookies += cantidad;
document.querySelector("#cookies").innetHTML = toString(cookies);
}

Answer 1

Oh, I think I understood. When using the name "cookie" in my function, an error occurred ...

Answer 2

We will better understand your issue if you post your code

Answer 3

You cannot access to cookies on SL