Warning: [mysql error 145] Table '.\piwi\piwigo_sessions' is marked as crashed and should be repaired

SELECT data
  FROM piwigo_sessions
  WHERE id = '36C660vemdn0c2ohb485rk76um5gk6'
; in D:\PHPWAMP_8.8.8.8IN\wwwroot\Piwigo\include\dblayer\functions_mysqli.inc.php on line 845
Fatal error: Call to a member function fetch_assoc() on a non-object in D:\PHPWAMP_8.8.8.8IN\wwwroot\Piwigo\include\dblayer\functions_mysqli.inc.php on line 226