# 錯誤: 欲連結之網址（URL）無法正確的傳回

# ERROR

## The requested URL could not be retrieved

Invalid Request error was encountered while trying to process the request:

>     %R

Some possible problems are:

- 要求方式遺失或是未知

- 網站位置遺失

- HTTP 標準的宣告遺失（HTTP/1.0）

- 要求命令過長

- Content-Length missing for POST or PUT requests.

- 欲連結的主機名稱包含不合法的字元；底線這個字元是不被允許存在的。

- HTTP/1.1 Expect: feature is being asked from an HTTP/1.0 software.

Your cache administrator is %w.