You have a few problems here. Firstly, it is expected that the request will be sent to port 69345 (which is very similar to the port configured using the debugger). Is this port currently serving requests? Can you go to this page without an iframe? When a page is deployed in production, this URL is absolutely guaranteed to break, because localhost always permits 127.0.0.1, which is relative to the client, not the server. You need to reconsider what the actual address is or should be. Since some posters answered when I print this, your problem may be as simple as using a relative url. If this does not concern your problem, you will need to examine the actual names of the ports and servers that this handler will serve.
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