Failed to complete tunnel connection code example

Example: failed to complete tunnel connection ngrok

ngrok shows this error when the local server is not running
start your server first and also check the server port as well as ngrok port

For example: i am using two servers WAMP && XAMPP
WAMP is on port 80
While
XAMPP is on port 8012

therefore the command will be

ngrok http 80 for WAMP folder
ngrok http 8012 for xampp folder