Fatal error: Uncaught TypeError: usort(): Argument #1 ($array) must be of type array, false given in /home/riyodehome/riyodehome.co.jp/public_html/wp-content/themes/riyodehome-theme/functions.php:780 Stack trace: #0 /home/riyodehome/riyodehome.co.jp/public_html/wp-content/themes/riyodehome-theme/functions.php(780): usort(false, 'compareWorkCate...') #1 /home/riyodehome/riyodehome.co.jp/public_html/wp-content/themes/riyodehome-theme/single-work.php(38): getWorkCategories(false) #2 /home/riyodehome/riyodehome.co.jp/public_html/wp-includes/template-loader.php(106): include('/home/riyodehom...') #3 /home/riyodehome/riyodehome.co.jp/public_html/wp-blog-header.php(19): require_once('/home/riyodehom...') #4 /home/riyodehome/riyodehome.co.jp/public_html/index.php(17): require('/home/riyodehom...') #5 {main} thrown in /home/riyodehome/riyodehome.co.jp/public_html/wp-content/themes/riyodehome-theme/functions.php on line 780