django.db.utils.OperationalError: (1045, "Access denied for user 'root'@'localhost' (using password: NO)")

This error message indicates that the user 'root' is trying to connect to a MySQL database on the local machine (localhost) without providing a password, but the MySQL server is denying access.

To fix this error, you can try the following steps:

1. Make sure that you have the correct username and password for the MySQL server. You can check this by logging in to MySQL using the command line or a GUI tool like MySQL Workbench.

2. If you are using a password to connect to the MySQL server, make sure that you have specified it correctly in your Django settings file. You can do this by setting the 'PASSWORD' key in the 'DATABASES' dictionary to your MySQL password.

3. If you are still having trouble connecting to the MySQL server, you may need to grant the 'root' user permission to access the database. You can do this by logging in to MySQL as the 'root' user and running the following command:

GRANT ALL PRIVILEGES ON *.* TO 'root'@'localhost' IDENTIFIED BY 'your_password';

Replace 'your_password' with your actual MySQL password.

4. Finally, make sure that the MySQL server is running and accessible from the machine where your Django application is running. You can test this by trying to connect to the MySQL server using the command line or a GUI tool.