Argument 1 passed to Typecho\Router::match() must be of the type string, null given, called in /www/sites/blog.mitsuha.space/index/var/Widget/Feed.php on line 84

TypeError: Argument 1 passed to Typecho\Router::match() must be of the type string, null given, called in /www/sites/blog.mitsuha.space/index/var/Widget/Feed.php on line 84 and defined in /www/sites/blog.mitsuha.space/index/var/Typecho/Router.php:46 Stack trace: #0 /www/sites/blog.mitsuha.space/index/var/Widget/Feed.php(84): Typecho\Router::match(NULL, Array) #1 /www/sites/blog.mitsuha.space/index/var/Typecho/Widget.php(155): Widget\Feed->execute() #2 /www/sites/blog.mitsuha.space/index/var/Typecho/Router.php(85): Typecho\Widget::widget('\\Widget\\Feed', NULL, Array) #3 /www/sites/blog.mitsuha.space/index/index.php(23): Typecho\Router::dispatch() #4 {main}