Was this site working before? If so, you probably have a corrupt table. Use PHPMYADMIN to repair the table in question. It should be part of your hosting package, so contact your host for details.
https://www.thoughtco.com/repairing-mysql-database-with-phpmyadmin-2693966
When I click on the link you provided, I currently see an error message stating that the database connection could not be established. You should be able to resolve this by adjusting the database access data in the wp-config.php file to match the information provided to you by your host. If necessary, contact your host’s support team.
I am therefore unsure where you are seeing the error message you mentioned. Without a database connection, WordPress cannot and will not even attempt to retrieve specific database tables. The message itself states that one of the basic WordPress tables does not exist. If you install WordPress as described in the instructions here, this should never happen: https://developer.wordpress.org/advanced-administration/before-install/howto-install/
@miroslawz,
When I visit the link you provided, it seems to be working — have you already resolved this issue?
Hi,
Thank you for your support. I managed to solve the problem. The issue was actually in the database.
Best regards