Hi,
Here's what I was looking for:
Something else on your machine is already using the port that Ignition is trying to use. As you can imagine, this is a big problem for a web-server based product.
You can change the port for Ignition by editing "config.xml" in the install directory. Change the port to something else, like 8090, and try starting it again. After changing it, you will of course need to access the gateway with that port, for example "http://localhost:8090".
Regards,