The output contains such text as:
Failed to access data: <!DOCTYPE HTML PUBLIC "-//IETF//DTD HTML
2.0//EN"> <HTML><HEAD> <TITLE>405 Method Not Allowed</TITLE>
</HEAD><BODY> <H1>Method Not Allowed</H1> The requested method POST is
not allowed for the URL /dynatable/calendar0.txt.<P> <HR>
<ADDRESS>Apache/1.3.29 Server at localhost Port 80</ADDRESS>
</BODY></HTML>
The widgets do appear below this message though.
In my case apache was just pointing to the wrong server. It may be
looking for the dynaset server-side application on the wrong
server/port. Or the server side component may not be starting for some
reason.