Fatal error: Uncaught TypeError: usort(): Argument #1 ($array) must be of type array, null given in /var/www/html/product_2017/www.setagayaartmuseum.or.jp/samuseumclass/common_database_func.php:1920
Stack trace:
#0 /var/www/html/product_2017/www.setagayaartmuseum.or.jp/samuseumclass/common_database_func.php(1920): usort()
#1 /var/www/html/product_2017/www.setagayaartmuseum.or.jp/es/search/index.php(140): searchKeyword()
#2 {main}
thrown in /var/www/html/product_2017/www.setagayaartmuseum.or.jp/samuseumclass/common_database_func.php on line 1920