Fatal error: Uncaught TypeError: Unsupported operand types: string - string in /data02/virt14029/domeenid/www.merit.ee/new2020/wp-content/themes/neway/taxonomy-support_category.php:20 Stack trace: #0 [internal function]: {closure}(Array, Array) #1 /data02/virt14029/domeenid/www.merit.ee/new2020/wp-content/themes/neway/taxonomy-support_category.php(17): usort(Array, Object(Closure)) #2 /data02/virt14029/domeenid/www.merit.ee/new2020/wp-includes/template-loader.php(106): include('/data02/virt140...') #3 /data02/virt14029/domeenid/www.merit.ee/new2020/wp-blog-header.php(19): require_once('/data02/virt140...') #4 /data02/virt14029/domeenid/www.merit.ee/new2020/index.php(17): require('/data02/virt140...') #5 {main} thrown in /data02/virt14029/domeenid/www.merit.ee/new2020/wp-content/themes/neway/taxonomy-support_category.php on line 20