Hmm... I'd suggest opening the Javascript console and seeing if there is an error being shown. In Chrome, you go to View->Developer->Javascript Console, not sure on Firefox, but probably similar. If there is an error when you try to open that handout, you'll probably need a dev's assistance to look at it. You might also try looking at the handout in the External Journal and see if it pulls up. Also, you can try editing the Handout and see if the content shows up for edit even if it doesn't get displayed.