Hi Ana Maria,
The number 8080 is the port the service is running on. The PURL service uses that port by default in order to avoid conflicts with any Web service on your machine that is using the default port for Web services, which is port 80.
If the PURL server cannot bind to port 8080, it might be because you already have another service using that port. Tomcat or Jetty use port 8080 by default and are common causes of port conflicts. In that case, you will see the failure to bind to the port in your log files. Please change the port number in your PURL configuration to one that is not being used.