Community @ The Turning Gate

While trying to open my gallery pages I suddenly get the following error. Changed nothing. Any idea?

is_readable(): open_basedir restriction in effect. File(/dev/urandom) is not within the allowed path(s): (/var/www/vhosts/familielvb.nl/:/tmp/)|#0 [internal function]: ErrorHandler::handleError(2, 'is_readable(): ...', '/var/www/vhosts...', 66, Array) #1 /var/www/vhosts/familielvb.nl/httpdocs/wp-includes/random_compat/random.php(66): is_readable('/dev/urandom') #2 /var/www/vhosts/familielvb.nl/httpdocs/wp-includes/compat.php(338): require('/var/www/vhosts...') #3 /var/www/vhosts/familielvb.nl/httpdocs/wp-settings.php(80): require('/var/www/vhosts...') #4 /var/www/vhosts/familielvb.nl/httpdocs/wp-config.php(83): require_once('/var/www/vhosts...') #5 /var/www/vhosts/familielvb.nl/httpdocs/wp-load.php(37): require_once('/var/www/vhosts...') #6 /var/www/vhosts/familielvb.nl/httpdocs/galleries/phplugins/phplugins.php(130): require_once('/var/www/vhosts...') #7 /var/www/vhosts/familielvb.nl/httpdocs/ttg-be/templates/gallery/wp-gallery-flvb-black/template_index.php(19): require_once('/var/www/vhosts...') #8 /var/www/vhosts/familielvb.nl/httpdocs/ttg-be/publisher/application/controllers/GalleryController.php(323): include_once('/var/www/vhosts...') #9 [internal function]: GalleryController->gallery('', 'index', '') #10 /var/www/vhosts/familielvb.nl/httpdocs/ttg-be/framework/controllers/Controller.php(41): call_user_func_array(Array, Array) #11 /var/www/vhosts/familielvb.nl/httpdocs/ttg-be/framework/Framework.php(124): Controller->dispatch(Array) #12 /var/www/vhosts/familielvb.nl/httpdocs/galleries/andros-sept-2015/lib.php(48): Framework->route() #13 /var/www/vhosts/familielvb.nl/httpdocs/galleries/andros-sept-2015/index.php(4): route(Array) #14 {main}|URL: /galleries/andros-sept-2015/index.php