静态页下 搜索出错 非法字符

静态页面下，包括首页，搜索出现：

Discuz! System Error您当前的访问请求当中含有非法字符，已经被系统拒绝
PHP Debug

• [Line: 0022]search.php(discuz_application->init)
• [Line: 0071]source\class\discuz\discuz_application.php(discuz_application->_init_misc)
• [Line: 0552]source\class\discuz\discuz_application.php(discuz_application->_xss_check)
• [Line: 0355]source\class\discuz\discuz_application.php(system_error)
• [Line: 0023]source\function\function_core.php(discuz_error::system_error)
• [Line: 0024]source\class\discuz\discuz_error.php(discuz_error::debug_backtrace)