Sven Kortekaas on "MySQL crashed?"

Hello, my website (https://brandweeruitgeest.nl) isn't working anymore.

It said I had to add the line:

define('WP_ALLOW_REPAIR', true);

To wp_config.php and I did. Used the button repair and optimalise but it didn't worked. The output was:

options: Table is marked as crashed
postmeta: 1 client is using or hasn't closed the table properly

Can someone please help me?