WordPress Error Establishing a Database Connection This error is due to a weak and not connection to the database. You can solve in these ways:First of all, you have to check database name, username, password, and host are correct or not. .Repair Database: Add define('WP_ALLOW_REPAIR', true); in wp-config.php, then visit yourdomain.com/wp-admin/maint/repair.php.
Check Server Status: It may be overloaded and bring down your MYSQL server.
Fixing this error usually involves database access credentials or server configuration.
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