Use the developer tools in your browser to see if it is making the call to a file that actually exists.
If you can load the file in your browser, Construct will be able to find it too (assuming you are telling Construct the proper place to look).
Company name changed to avoid Facebook-type shenanigans
"Someone once told me I bite off more than I can chew...
I told them I would rather choke on greatness than nibble on mediocrity."