Warning: mysqli::mysqli(): (HY000/2005): Unknown MySQL server host 'mysql51-97.perso' (2) in /home/lepeller/www/piwigo/include/dblayer/functions_mysqli.inc.php on line 52

Warning: my_error(): Couldn't fetch mysqli in /home/lepeller/www/piwigo/include/dblayer/functions_mysqli.inc.php on line 848

Warning: my_error(): Couldn't fetch mysqli in /home/lepeller/www/piwigo/include/dblayer/functions_mysqli.inc.php on line 848

Piwigo encountered a non recoverable error

[mysql error ] 
Can't connect to server

#1	my_error /home/lepeller/www/piwigo/include/common.inc.php(113)
#2	include_once /home/lepeller/www/piwigo/index.php(11)