Can not connect to local host

[Gottano]

When I open localhost (http://localhost:3000/) I get "connection refused" error message. I tried a couple of browsers and get the same error.

Any ideas?

[Lendemor]

Please give more informations.
What is your OS?
Are you running pc run correctly (any error?) ?
Can you check if the process is correctly listening to port 3000 ?

[Gottano]

Thank you for your suggestions. It turns out that one of the folders had an exclamation mark as part of its name, which threw up errors I hadn't noticed. I renamed the folder and is running fine now.