java.net.BindException: Address already in use: bind
My localhost:4567/ webpage would not run.
And I was getting this error. I found THE SOLUTION at :
I assume others may run into the problem during this video in future so I am posting it here.
It's nice of you to post your solution but you don't need to go through all of that. All it means is that in IntelliJ you already had the server running and tried to run a second instance. Just stop the previous one and lunch it back again. Optionally you can go to Edit configurations... and tick the box Single instance only so you won't run into that problem in the future.