Warning: mysqli::__construct(): php_network_getaddresses: getaddrinfo for db753734510.db.1and1.com failed: Name or service not known in /homepages/17/d249945547/htdocs/piwigo/include/dblayer/functions_mysqli.inc.php on line 52

Warning: Attempt to read property "errno" on null in /homepages/17/d249945547/htdocs/piwigo/include/dblayer/functions_mysqli.inc.php on line 839

Warning: Attempt to read property "error" on null in /homepages/17/d249945547/htdocs/piwigo/include/dblayer/functions_mysqli.inc.php on line 839

Piwigo encountered a non recoverable error

[mysql error ] 
php_network_getaddresses: getaddrinfo for db753734510.db.1and1.com failed: Name or service not known

#1	my_error /homepages/17/d249945547/htdocs/piwigo/include/common.inc.php(122)
#2	include_once /homepages/17/d249945547/htdocs/piwigo/about.php(11)