加载session 类库的问题

Vmask

使用$this->load->library('session');就提示
Internal Server Error

The server encountered an internal error or misconfiguration and was unable to complete your request.

Please contact the server administrator at admin@phpStudy.net to inform them of the time this error occurred, and the actions you performed just before this error.

More information about this error may be available in the server error log.

Hex

CI 版本号是多少？