Fatal error: Uncaught Error: Call to undefined function session_set_save_handler() in /usr/local/www/piwigo/include/functions_session.inc.php:18
Stack trace:
#0 /usr/local/www/piwigo/include/functions.inc.php(16): include_once()
#1 /usr/local/www/piwigo/include/common.inc.php(107): include('/usr/local/www/...')
#2 /usr/local/www/piwigo/index.php(11): include_once('/usr/local/www/...')
#3 {main}
thrown in /usr/local/www/piwigo/include/functions_session.inc.php on line 18