@Laz As all of my systems are behind a firewall - I’ve opened the Mirror to “public” access by using the config of
var config = {
address: "0.0.0.0",
port: 8080,
ipWhitelist: [],
...
then, I simply load the mirror in my main computer’s browser with http://mirror:8080 and use the devtools of my browser to view the errors and such.