If you can access the website from outside your LAN but you get webfail and networkfail. open all ports in software settings on your PC. the default is 8081-8085, 6911 and others, just check. this software NEEDS port 8080.
The remote admin port of most routers is 8080 so there will be conflict. Even if you are not using it for remote admin. you will have to assign some other port for the router's remote admin and portforward 8080 to your PC.
If this doesn't work, your router has routing rules in it. clear the rules affecting you out.
