Ran across this error in firebug after changing around the directory structure of one of our client's landing pages.<br><a href="https://cdn.joejiko.com/wp-content/uploads/2012/08/firebug-syntax-error.jpg"><img class="alignnone size-full wp-image-1153" title="firebug-syntax-error" alt="" src="https://cdn.joejiko.com/wp-content/uploads/2012/08/firebug-syntax-error.jpg" width="710" height="386" /></a><br>It's a very poorly worded and generic error message.<br>Obviously the <a href="https://www.w3schools.com/tags/tag_doctype.asp" target="_blank">doctype</a> doesn't have a syntax error..<br>So what does it mean?<br><strong>Some of the Javascript files on the page had invalid SRC urls.</strong><br>Check the URLs to your JS files on the page and the error will disappear.<br>Although it does mention the JS file that's missing, it makes it seem like the missing JS file is being loaded and has an issue on its first line.<br>Confusing?<br> <br><strong>Did this help you? Let me know in the comments!</strong>