Access denied for user 'root'@'localhost' (using password: YES)

This error message indicates that the user 'root' is being denied access to the MySQL server on the local machine (localhost), even though the correct password is being supplied. There could be several reasons for this error message, including:

1. Incorrect password: If the password being supplied is incorrect, the server will deny access to the user. Make sure that you are entering the correct password for the 'root' user.

2. Incorrect username or hostname: Make sure that you are using the correct username and hostname to access the MySQL server. If you are trying to connect to a remote server, you may need to use a different hostname or IP address.

3. Firewall or network settings: If there is a firewall or network setting that is blocking access to the MySQL server, you may get this error message. Check your firewall settings to make sure that the MySQL port (usually 3306) is open and accessible.

4. Permissions: The 'root' user may not have the necessary permissions to access the MySQL server. Check the MySQL user permissions to make sure that the 'root' user has the necessary privileges to access the server.

To troubleshoot this error message, you can try resetting the password for the 'root' user, checking your network settings and firewall, and verifying the MySQL user permissions.