To allow use of this page to automatically repair database problems, please add the following line to your wp-config.php file. Once this line is added to your config, reload this page.
define('WP_ALLOW_REPAIR', true);
Check secret keys
While you are editing your wp-config.php file, take a moment to make sure you have all 8 keys and that they are unique. You can generate these using the WordPress.org secret key service.
/wp-admin/maint/repair.php?referrer=is_blog_installed
https://www.examble.com/wp-admin/maint/repair.php?referrer=is_blog_installed