Plugin with AJAX on subdomains causes 404 in console

I have it working now. The file, ivevents.js, has an error in it. Rather than the console identifying the error, it gives the 404 error, as if the file doesn’t exist. When I corrected the error in the js file, the console error goes away.

Now, if I could only figure out how to use the console to see errors in .js instead of a 404.

Thanks for the help.