Error "Cannot GET /"

[PistonCube]

Hello Good evening, My name is Ezequiel. I wanted to report a track error. When I want to enter the web page Localhost:8080 and it gives me the error Error "Cannot GET /" and I did not find the solution and I have everything by default

I am running the track from my Windows 10 x64 computer and I have tried to run it on my VPS Ubuntu 20.04 x86