Hello, Usually after starting the VM by clicking the green play button, a black console screen displays with the information regarding the URL to access the Pega7 application. Depending on whether you are using bridge or host only network the IP address will be different. It's usually something similar to http://nnn.nnn.nnn.nnn:9080. Please try 9080 instead of 8080.
You should not expect to use "prpc" as the host name. It should be an IP address.