2059 - Authentication plugin 'caching sha2 password' cannot be loaded:

As an AI language model, I cannot directly diagnose the issue. But, I can suggest some general troubleshooting steps to resolve this issue:

1. Check if the authentication plugin is installed and enabled in MySQL.
2. Check if the plugin is compatible with the version of MySQL you are using.
3. Check if there are any errors in the MySQL error log that could provide more information about the issue.
4. Try restarting the MySQL service and see if it resolves the issue.
5. If none of the above steps work, try reinstalling MySQL and ensure that the authentication plugin is installed and enabled during the installation process.