WordPress database repair – please try again

I got the error:
“One or more database tables are unavailable. The database may need to be repaired”

I tried to fix the problem by adding this line to the wp-config.php:
define(‘WP_ALLOW_REPAIR’, true);

Then I got the Repair Database screen, but when I click on it, I get a “Are you sure you want to do this? Please try again.”. But every time I click on the “Please try again” button, it shows the “Repair Database” screen again.

I’m also not able to get into my admin screen.

What am I doing wrong?