getting an "script artisan error 1" after composer install

Question

After running the command below in my laravel project

composer.phar install

I got an error:

Script php artisan optimize handling the post-install-cmd event returned with error code 1

In Connection.php line 647: SQLSTATE[HY000] [2054] The server requested authentication method unknown t o the client (SQL: select * from options where option_key = currency_po sition limit 1)

In Connector.php line 68: SQLSTATE[HY000] [2054] The server requested authentication method unknown t o the client

In Connector.php line 68: PDO::__construct(): The server requested authentication method unknown to t he client [caching_sha2_password]

Does anyone encounter the same error? I already tried running the command 'composer update' but still nothing happened.