There are a couple of forum topics started on this problem. Here is a link to the one that had several suggestions to help. I have had the problem many times, but it has cleared and I've not seen it for a couple months. I hope something here will help you.
http://www.chess.com/forum/view/help-support/board-wont-show-in-email-chess?page=1
No chess pieces on board in my games. I get the following error:
Internet Explorer 6.0
Line 10
Char 36
Error: "chess handler" is null or not an object.
code 0
I have tried refresh, Ctrl - R with no result.
I cant change browsers. Thanks in advance for your reply.