# ERROR

## The requested URL could not be retrieved

The following error was encountered while trying to retrieve the URL: %U

> Invalid URL

Some aspect of the requested URL is incorrect.

Some possible problems are:

- Missing or incorrect access protocol (should be http:// or similar)

- Missing hostname

- Illegal double-escape in the URL-Path

- Illegal character in hostname; underscores are not allowed.

Your cache administrator is %w.