Problem with WordPress built-in Repair Tool

Hi,
I have a big problem. The database of my wordpress site seems to be crashed. I can’t have access to my wordpress dashboard and website anymore. A message come instead saying that I should repair the database by writing this sentence define(‘WP_ALLOW_REPAIR’, TRUE); in the wp-config.php. I did it and reload the page as it is said, I click on the repair button but it is written : do you really want to do this? thank you to try again (My wordpress is in french). Why doesn’t it work? I thought it would be simple

Please help me, it’s really important it’s for my work.

Thank you