“Can’t select database” Message

Hello, I have been using my website for a while now and it suddenly gave this warning: We were able to connect to the database server (which means your username and password is okay) but not able to select the cl53-estatepro database.

Are you sure it exists?
Does the user cl53-estatepro have permission to use the cl53-estatepro database?
On some systems the name of your database is prefixed with your username, so it would be like username_cl53-estatepro. Could that be the problem?

I did some research and checked what was suggested, i.e. also reloaded my wp_config.php and nothing is helping. Please assist me.
// ** MySQL settings – You can get this info from your web host ** //
/** The name of the database for WordPress */
define(‘DB_NAME’, ‘cl53-estatepro’);

/** MySQL database username */
define(‘DB_USER’, ‘cl53-estatepro’);

/** MySQL database password */
define(‘DB_PASSWORD’, ‘***********’);

/** MySQL hostname */
define(‘DB_HOST’, ‘localhost’);

/** Database Charset to use in creating database tables. */
define(‘DB_CHARSET’, ‘utf8’);

/** The Database Collate type. Don’t change this if in doubt. */
define(‘DB_COLLATE’, ”);