我有wordpress网站。我已经安装了mydomain\wp-content\themes\modern-blue-green-120070612-2\sidebar.php -blue-green-120070612-2 theme.Then,我在右手边看到一条错误消息"Fatal error: Call to undefined function cypher_previousposts() in mydomain\wp-content\themes\modern-blue-green-120070612-2\sidebar.php on 59“。
有人知道这一点吗?请帮帮我..