Did you try a different computer? Clear browser's cache?
Use Chrome's dev tools to inspect the javascript error and post it here.
1. Open the Console
Go to the screen where you are experiencing the error. In Chrome, navigate to View > Developer > JavaScript Console.
2. Identify the Error
The error console will open. If you don't see any errors try reloading the page. The error may be generated when the page loads.
The console will provide you with the error type, the location of the error and the line number
