@jonjabisch: Are you using Internet Explorer as your browser? I emailed the staff about this issue, and they said that this error primarily occurs with the Internet Explorer browser. They released a patch to fix it in January, and said it's possible that my computer still has an older version of the tools saved on it.
Try clearing your browser's cache and refreshing the page. (It didn't work for me, but maybe it'll work for you.) If that doesn't work, try switching browsers. I tried Firefox (which is free and safe to download) and the Draw tools work for me now!
I hope this helped you!