This is for people using Windows 10. Some of you might encounter this problem. This happened because port 8080 that youtube-local using is used by other services. Here is how I solved it.
open powershell.
enter netstat -na , find the row with port :8080
find the app's PID
go to task manager, details tab, find the corresponding PID and end the task
to prevent it again, right click on the app and go to services, disable it from auto starting.
This is for people using Windows 10. Some of you might encounter this problem. This happened because port 8080 that youtube-local using is used by other services. Here is how I solved it.
netstat -na
, find the row with port :8080