Fatal error: Uncaught Error: Class 'mysqli' not found in /www/piwigo/include/dblayer/functions_mysqli.inc.php:52
Stack trace:
#0 /www/piwigo/include/common.inc.php(109): pwg_db_connect()
#1 /www/piwigo/index.php(11): include_once('/www/piwigo/inc...')
#2 {main}
thrown in /www/piwigo/include/dblayer/functions_mysqli.inc.php on line 52