Typed property Typecho\Feed::$subTitle must be string, null used
TypeError: Typed property Typecho\Feed::$subTitle must be string, null used in /www/sites/blog.mitsuha.space/index/var/Typecho/Feed.php:143
Stack trace:
#0 /www/sites/blog.mitsuha.space/index/var/Widget/Feed.php(105): Typecho\Feed->setSubTitle(NULL)
#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}