Testing errors

My game fails Quicktest with this error:
TypeError: window.onerror is not a function”
I’m running the html version, as the batch file closes immediately after running the test. It does throw up an error message, but I can’t read it because the batch file closes. I’m pretty sure I’m doing something wrong, but what?

Its an error i always get when i put a symbol by accident or more frecuenly i did this by error.

bla bla bla

So you probably has missing a space somewhere

How do I tell which scene has the error?

In the quick text appear the scene it was cheecking a example

startup #1,#20… so if you read it you know it.