Database error

This message indicates that the database used by WordPress is corrupted. There are several ways to fix this:

• Restore a backup of the project. If you don’t have one yourself, contact your hosting provider’s support team.
• Or try using WordPress’s repair mode as described here starting with “Repairing the database in the browser”: https://kau-boys.com/2767/wordpress/repairing-the-wordpress-database
• Or try using WP CLI as described on the same page