That will then bring you to a page with the errors found
You will need to toggle these scripts off or fix the issue with the broken js.
We will turn off the droid-sans.cufonfonts.js and the ddsmoothmenu.js on this landing page to solve the issue.
We now need to scroll down and toggle off the two problem scripts by clicking on off
Now the problem scripts are off on this landing page and the error you are experiencing should go away.
If problem still exists: Run JS error tester again
In this case, simply run the error finder tool and toggle off the other script that fails.
In this tutorial example, I turned off droid-sans.cufonfonts.js and ddsmoothmenu.js and this caused another theme script custom.js to throw an error. I just toggled off the script: custom.js and everything works like it should.